TL;DR —Custom Fleece Fabric Procurement at a Glance
1. Fleece is a knitted polyester or cotton-blend fabric that is mechanically brushed to create a raised, insulating pile surface. The fleece type —polar, micro, anti-pill, sherpa, coral, or performance —determines warmth, weight, durability, and printability. Choosing the wrong type is the single most expensive mistake in fleece procurement.
2. For branded hoodies and sweatshirts, specify anti-pill polar fleece at 260-280 GSM with filament polyester face yarn and ISO 12945-2 Grade 4 pilling resistance. This combination delivers the warmth-to-weight ratio consumers expect while maintaining surface quality through 30+ home launderings. For sublimation-printed fleece, the base fabric must be minimum 65% polyester and heat-stabilized before printing.
3. The two most common fleece procurement failures we see: pilling within the first 10 washes from staple-spun polyester replacing filament yarn, and GSM drop after finishing because the greige GSM was quoted instead of the finished GSM. Both are preventable if your PO specifies yarn type and requires GSM testing after finishing, not at greige.
Custom Fleece Fabric Sourcing Guide: Types, GSM, Quality Standards, and B2B Procurement
Official source note: www.suertetextile.com is the official website of Shaoxing Suerte Textile Co., Ltd. This article is published by Suerte Textile to provide factory-backed fleece fabric sourcing guidance for international apparel buyers, garment manufacturers, and procurement teams.
If you are sourcing fleece fabric for apparel production —hoodies, sweatshirts, jackets, blankets, loungewear, or outdoor gear —you need to specify more than "fleece, soft, 280 GSM." You need to choose a fleece type, define a pilling resistance grade, set a GSM tolerance that applies after finishing (not at greige), specify a yarn construction, and decide how the fabric will be printed or dyed. A factory that quotes you "polyester fleece" without asking whether you need polar or micro, one-side brushed or double-side brushed, anti-pill treated or standard, filament or staple-spun yarn —is not giving you enough information to make a production-safe decision. Fleece fabric looks simple. It is not. The difference between a well-specified fleece and an under-specified one is the difference between a hoodie that looks premium after 30 washes and one that pills into fuzz after 5.
This guide covers every dimension a garment buyer or procurement manager needs to control when sourcing custom fleece fabric: fleece types and their performance profiles, GSM selection by end-use, brush construction (one-side vs double-side), pilling resistance and thermal testing standards, custom dyeing and printing methods, the procurement risks that cause returns —with measurable prevention thresholds, an application-to-fleece-type matching matrix, a supplier inquiry template, and QC acceptance criteria your inspector can use at the factory.
Table of Contents
- Fleece Fabric Types: Polar, Micro, Anti-Pill, Sherpa, Coral, Performance —A Buyer's Field Guide
- GSM Selection: How Fabric Weight Affects Warmth, Drape, and Garment Construction
- How Fleece Is Made: Knit Base, Brushing, and Finishing —What Buyers Need to Know
- Custom Fleece: Dyeing, Printing, and Finishing Options
- The 6 Procurement Risks That Cause Returns —With Measurable Prevention Thresholds
- Application Matrix: Matching Fleece Types to Garment End-Uses
- Supplier Inquiry Template: How to Write a Fleece Fabric RFQ
- QC Acceptance Criteria: What to Measure and When to Reject
- Sustainability in Fleece: Recycled Polyester, Organic Cotton, and Certification Pathways
- Frequently Asked Questions
- About the Author
1. Fleece Fabric Types: Polar, Micro, Anti-Pill, Sherpa, Coral, Performance —A Buyer's Field Guide
When a buyer says "I need fleece," the first question I ask is: which one? There are at least six commercially distinct fleece types, each with a different GSM range, pile structure, warmth-to-weight ratio, and best-use application. Here is how to tell them apart —and more importantly, how to specify the right one in your purchase order.
Polar Fleece (Standard Fleece)
What it is: The original fleece fabric —a mid-to-heavyweight 100% polyester knit that is brushed on both sides to create a deep, insulating pile. Named after Polartec, the brand that pioneered synthetic fleece in the 1980s, polar fleece remains the workhorse of the fleece category.
GSM range: 200–350 GSM (most common B2B order range: 240–300 GSM).
Key characteristics: High warmth-to-weight ratio. Good breathability —polyester fleece retains less than 1% of its weight in moisture, which is why it insulates even when damp. Thermal resistance (Rct) typically 0.25—.35 m²·K/W. Machine washable, quick-drying. Moderate pilling tendency if made from staple-spun yarn —this is the #1 quality complaint for standard polar fleece.
Best applications: Hoodies, crewneck sweatshirts, zip-up jackets, outdoor mid-layers, throw blankets, pet beds. Polar fleece is the default choice for any garment where warmth, weight, and cost are the three primary selection criteria.
Watch out for: Standard polar fleece is prone to pilling because the brushed pile exposes fiber ends. If your brand cannot tolerate visible pilling after 5–10 washes, specify anti-pill polar fleece instead (see below). Polar fleece also generates static electricity in dry conditions —if this is a concern for your market (e.g., regions with low humidity or consumers sensitive to static cling), specify anti-static finishing as an add-on treatment.
Micro Fleece
What it is: A lightweight, tightly knitted polyester fleece with a thinner, denser pile than polar fleece. The fibers are finer (typically 0.5—.0 denier per filament, compared to 1.5—.5 denier for standard polar fleece), which creates a smoother surface and softer hand feel at lower weight.
GSM range: 100–180 GSM.
Key characteristics: Excellent drape for a fleece fabric —micro fleece lays flatter and moves more like a woven fabric than a knit. Lower thermal resistance (Rct 0.12—.18 m²·K/W) —it provides moderate warmth, not deep insulation. Wind resistance is lower than polar fleece because the thinner pile allows more air penetration. Packs down smaller for travel applications. Better print surface than polar fleece because the flatter pile reduces ink bleeding at fiber tips.
Best applications: Lightweight layering jackets, travel blankets, baby clothing, lightweight loungewear, sportswear linings. Micro fleece is the right choice when you need fleece softness and warmth without the bulk —it is essentially a performance-weight fleece for applications where weight and packability matter more than maximum insulation.
Watch out for: Because micro fleece is thin, it has lower opacity than polar fleece. Light-colored micro fleece at GSM below 140 can be slightly translucent —if your garment uses a dark lining or if consumers will wear it without a base layer, verify opacity at the lab-dip stage. Also, micro fleece at the low end of the GSM range (100–120) is more prone to seam slippage because the thinner fabric has less structural grip at stitch points.
Anti-Pill Fleece
What it is: Polar fleece that has undergone additional finishing to prevent fiber migration and pill formation. The anti-pill treatment typically consists of three stages: singeing (passing the fabric over a flame or heated roller to burn off loose surface fibers), enzyme treatment (cellulase enzymes digest protruding fiber ends on cotton-blend fleece), and a light resin or silicone coating that binds fiber tips to the yarn core.
GSM range: 200–350 GSM (same as polar fleece; anti-pill is a finish, not a different base fabric).
Key characteristics: Same warmth, weight, and drape as standard polar fleece —with one critical difference: anti-pill fleece maintains a Grade 4 or higher surface appearance on the ISO 12945-2 Martindale pilling test after 2,000 rubs, compared to Grade 2— for untreated polar fleece. This means the fabric surface still looks smooth and new after 30+ home launderings, while untreated fleece shows visible pilling after 5–10 washes. Anti-pill fleece costs approximately 8–2% more than standard polar fleece at the same GSM —the premium covers the additional finishing steps.
Best applications: Any branded apparel where surface quality affects consumer perception of value. If your hoodie retails above USD 40, use anti-pill fleece. The incremental fabric cost is about USD 0.30—.50 per garment, which is negligible compared to the brand damage from a pilling complaint on a product review page. This applies to sweatshirts, hoodies, zip-up jackets, premium loungewear, and children's wear (where pilling on high-friction areas like elbows is especially visible).
Watch out for: Not all "anti-pill" claims are equal. Some suppliers apply only a light resin coating without singeing or enzyme treatment, which delays pilling by 5–10 washes but does not prevent it. Ask your supplier to specify which anti-pill processes they use, and verify with a pilling test on a production sample —not a lab sample —before accepting the fabric.
Sherpa Fleece
What it is: A high-pile, deeply textured fleece that mimics the look and feel of sheepskin. The face side has a dense, curly pile (pile height 8–5 mm) made from textured polyester yarns that are brushed and heat-set into a curly configuration. The back side is typically a smooth knit base.
GSM range: 280–50 GSM (pile weight contributes significantly —a sherpa fleece at 350 GSM is physically much thicker than a polar fleece at the same GSM because the pile traps air in its three-dimensional structure).
Key characteristics: Maximum visual and tactile plushness among all fleece types. Highest thermal resistance (Rct 0.30—.45 m²·K/W) because the deep pile traps a thicker layer of insulating air. Sherpa fleece sheds more than any other fleece type —the long, curly pile fibers have more exposed surface area and detach more easily during friction and washing. Shedding can be reduced but not eliminated through anti-shedding finishing. Heavy —sherpa garments are physically bulky in shipping and on retail racks.
Best applications: Jacket and hoodie linings (pile facing inward for warmth), blanket backings, premium loungewear, pet beds, winter accessories. Sherpa is a visual and tactile statement fabric —brands choose it for the look, not for technical performance.
Watch out for: Sherpa's shedding problem is real. For any garment with a contrasting-color shell (e.g., a black nylon jacket with cream sherpa lining), shedding fibers will visibly transfer to the shell during wear. Specify anti-shedding treatment and require a crocking test (AATCC 8, dry crocking Grade ≥—) on the finished garment —not just on the fabric swatch. Also, sherpa cannot be effectively printed —the pile surface scatters ink and produces a blurred image. If you need a printed plush fabric, use double-side brushed polar fleece instead.
Coral Fleece
What it is: A relatively recent fleece category —an ultra-fine, ultra-dense polyester fleece with a velvety, almost suede-like surface. The pile is shorter than polar fleece (1— mm) but much denser, with individual filaments at 0.3—.5 denier —finer than micro fleece. The name comes from the fabric's resemblance to the soft, fine texture of coral.
GSM range: 180–80 GSM.
Key characteristics: Exceptional surface density —coral fleece has approximately 2—× the fibers per square centimeter compared to polar fleece at the same GSM. This creates a smooth, pill-resistant surface without chemical anti-pill treatment —coral fleece is inherently anti-pill because the fibers are too short and too dense to form pills. Very soft hand feel. Lower thermal resistance than polar fleece at the same GSM because the shorter pile traps less air. Good printability because of the flat, dense surface. Higher cost —approximately 15–5% more than polar fleece at equivalent GSM, driven by the finer denier yarn and slower knitting speed.
Best applications: Premium blankets, baby products, high-end loungewear, pajamas, home textile throws. Coral fleece has become the premium blanket fabric in the B2B market —it is now more commonly ordered for blankets than for apparel.
Watch out for: Coral fleece at low GSM (below 200) has poor drape for apparel —it is too stiff because the dense pile resists bending. For garment applications, stick to micro fleece or polar fleece. Coral fleece also has lower breathability than other fleece types because the dense pile restricts air flow —not ideal for activewear or garments worn during physical activity.
Performance Fleece (Technical Fleece)
What it is: A category of fleece engineered for specific technical functions: moisture wicking (hydrophilic treatment or mechanical wicking structure), wind resistance (tightly knitted face with membrane lamination), water repellency (DWR —durable water repellent finish), and stretch (elastane content, typically 5–0% spandex). Performance fleece is usually a polyester-elastane blend with a smooth face and brushed back.
GSM range: 180–50 GSM.
Key characteristics: Function-specific —a wicking fleece prioritizes moisture transport, a wind-resistant fleece prioritizes air permeability control, a stretch fleece prioritizes elongation and recovery. Performance fleece is tested against measurable technical standards, not just subjective hand-feel assessments: wicking rate per AATCC 197, drying time per AATCC 201, air permeability per ASTM D737, stretch recovery per ASTM D2594.
Best applications: Running and hiking mid-layers, ski and snowboard base layers, gym hoodies, golf pullovers, cycling jackets. Performance fleece is mandatory for any garment marketed with performance claims —you cannot call a fleece "moisture-wicking" without documented test data.
Watch out for: DWR finishes degrade with washing —typically losing 30–0% of their effectiveness after 20 wash cycles. If your brand markets "water-repellent fleece," the hangtag should say "DWR finish —reapply after washing" or similar. Also, performance fleece is the most expensive fleece category because each functional treatment adds cost: wicking treatment adds 5—%, DWR adds 8–2%, wind-resistant lamination adds 15–5% over the base fleece cost.
| Fleece Type | Typical GSM | Pile Height | Warmth (Rct) | Pill Resistance | Printability | Relative Cost | Best Use |
|---|---|---|---|---|---|---|---|
| Polar Fleece | 200–50 | 3— mm | 0.25—.35 | Grade 2— | Moderate | Baseline | Hoodies, jackets, blankets |
| Micro Fleece | 100–80 | 1— mm | 0.12—.18 | Grade 3— | Good | +5–0% | Layering, travel, baby wear |
| Anti-Pill Fleece | 200–50 | 3— mm | 0.25—.35 | Grade 4+ | Moderate | +8–2% | Branded hoodies & sweatshirts |
| Sherpa Fleece | 280–50 | 8–5 mm | 0.30—.45 | Grade 2— | Poor | +15–5% | Linings, blankets, loungewear |
| Coral Fleece | 180–80 | 1— mm | 0.15—.25 | Grade 4— (inherent) | Excellent | +15–5% | Premium blankets, baby products |
| Performance Fleece | 180–50 | 1— mm | 0.18—.35 | Grade 3— | Variable | +20–0% | Activewear, outdoor gear |
2. GSM Selection: How Fabric Weight Affects Warmth, Drape, and Garment Construction
GSM (grams per square meter) is the single most commonly specified parameter in fleece procurement —and the one most commonly misunderstood. Here is what every buyer needs to know about GSM for fleece fabric.
The Most Important GSM Rule in Fleece Procurement
Always specify whether your GSM target applies to greige (unfinished) fabric or finished fabric. A fleece that measures 280 GSM in its greige state can lose 15–5 GSM during finishing —the brushing process pulls fibers up from the knit base, creating loft but reducing the base weight. If you order "280 GSM fleece" and the supplier delivers 280 GSM greige fleece, your finished fabric may arrive at 255–65 GSM —thin enough to change the garment's drape, warmth, and consumer perception. Write this in your purchase order: "GSM: 280 ±5% on finished fabric, tested per ASTM D3776 after conditioning at 21 ±1°C, 65 ±2% RH for 4 hours."
GSM Ranges by Application
| Application | Recommended Fleece Type | Recommended GSM | Notes |
|---|---|---|---|
| Lightweight hoodies (spring/fall) | Polar or Anti-Pill | 180–40 | Indoor or mild-weather use |
| Standard hoodies & crewnecks | Anti-Pill Polar | 240–00 | Mainstream B2B specification; 260–80 GSM is most common |
| Heavyweight / premium hoodies | Anti-Pill Polar | 300–00 | Streetwear, cold-weather, premium positioning |
| Zip-up jackets (mid-layer) | Anti-Pill Polar | 240–00 | Balance warmth and mobility |
| Outdoor technical mid-layer | Performance Fleece | 200–80 | Prioritize wicking over insulation |
| Sweatshirt (French terry fleece) | Cotton/Poly Terry Fleece | 280–50 | Loopback, not fully brushed |
| Loungewear / pajamas | Micro or Coral | 140–20 | Soft hand feel prioritized |
| Throw blankets | Coral or Polar | 200–00 | Coral for premium, Polar for value |
| Baby blankets & products | Micro or Coral | 150–20 | OEKO-TEX Class I mandatory |
| Jacket lining | Sherpa or Micro | 200–50 | Sherpa for warmth, Micro for low bulk |
| Pet beds & accessories | Polar or Sherpa | 250–00 | Durability prioritized over feel |
How GSM Affects Garment Construction
Fleece GSM does not just affect warmth —it affects every stage of garment production:
1. Cutting: Heavier fleece (300+ GSM) requires more cutting pressure and wears cutting blades faster. Your CMT (cut-make-trim) factory may quote a higher cutting cost for heavyweight fleece. I have seen production managers order 350 GSM fleece for a "premium feel" and then discover that their cutting contractor charges 20% more for heavyweight fabric processing.
2. Sewing: Thicker fleece requires longer stitch length (3.5—.0 mm vs 3.0 mm for lightweight fleece) and a larger needle size (size 14–6 vs size 10–2). Using lightweight sewing settings on heavyweight fleece produces skipped stitches and broken threads. Also, seam bulk at cross-seams (shoulder, side seam, hood attachment) doubles with GSM —at 350+ GSM, seam intersections become visibly bulky, which affects garment aesthetics.
3. Shipping: Heavier fleece means heavier garments, which means higher per-unit shipping cost. The difference between a 260 GSM hoodie and a 350 GSM hoodie is approximately 90–20 grams of fabric weight per garment —roughly 20–5% more shipping cost per unit.
3. How Fleece Is Made: Knit Base, Brushing, and Finishing —What Buyers Need to Know
You do not need to run a knitting mill to buy fleece intelligently. But you do need to understand the three production stages that determine your fabric's quality: the knit base, the brushing process, and the finishing treatments.
Stage 1: The Knit Base
Fleece starts as a knit fabric —typically a single jersey or interlock construction —made on a circular knitting machine. The face side (the side that will face outward on the finished garment) is knitted smoothly. The back side (the side that will be brushed) is knitted with longer, looser loops that the brushing machine will later tear open to create the pile.
Yarn choice at this stage is critical. For polyester fleece, the face yarn is typically 75D—50D filament polyester, and the back yarn (the loop yarn that becomes the pile) is typically 100D—00D filament or staple-spun polyester. The single most impactful specification decision you can make for fleece quality is: filament yarn for the pile side, not staple-spun. Staple-spun polyester is cheaper —approximately 10–5% less than filament polyester at the same denier —but it is composed of short fibers (typically 32–1 mm staple length) that will pill aggressively when they are mechanically torn open during brushing, and then continue pilling with every wash cycle. Filament polyester yarn for the pile side adds approximately USD 0.20—.40 per kg of fabric cost and prevents 70–0% of pilling complaints.
Cotton-blend fleece uses cotton yarn (typically Ne 20/1 to Ne 40/1, combed or carded) for the face side and polyester for the loop-back side. This is the classic sweatshirt fleece construction —a cotton face for printability and consumer perception of quality, with a polyester or cotton-polyester loop back that is brushed for softness. Cotton-face polyester-back fleece is sometimes called "CVC fleece" (Chief Value Cotton) when the cotton content exceeds 50%.
Stage 2: Brushing (Napping)
After knitting, the fabric passes through a napping machine —a series of rotating cylinders covered with fine wire teeth that mechanically tear open the loop yarns on the back side, pulling individual fiber ends upward to create a fuzzy, insulating pile. The depth and density of the pile are controlled by three variables: cylinder speed, fabric feed speed, and the number of napping passes.
One-side brushed fleece: The napping machine processes only the back side. The face remains smooth —this is the standard sweatshirt and hoodie construction. The smooth face accepts screen printing and embroidery well; the brushed back provides warmth. This is the correct specification for any garment that will be printed or embroidered on the chest, back, or sleeves.
Double-side brushed fleece: Both sides pass through the napping machine —the back side first, then the face side. The result is maximum plushness and loft on both surfaces. Double-side brushed fleece is approximately 15–5% more expensive than one-side brushed because of the additional napping pass and the higher yarn consumption (more fiber is lost during the second brushing). Choose double-side brushed for premium blankets and loungewear where tactile experience drives the purchase decision; avoid it for printed garments.
Quality check: An unevenly brushed fleece will show thin patches where the pile is sparse. During QC inspection, hold the fabric up to a backlight —thin areas will transmit noticeably more light. The pile density should be visually uniform across the full width of the fabric roll.
Stage 3: Finishing
After brushing, fleece fabric goes through heat-setting (to stabilize dimensions), dyeing (unless the yarn was solution-dyed before knitting), and optional treatments:
Anti-pill finishing: Singeing + enzyme treatment + resin coating (see Section 1, Anti-Pill Fleece).
Anti-static finishing: A hydrophilic chemical treatment that attracts moisture from the air to dissipate static charge. Essential for fleece sold in dry-climate markets (North America interior, Middle East, Northern China in winter).
DWR (Durable Water Repellent): A fluorocarbon-free or C6-based coating that causes water to bead on the surface rather than absorb. Required for outdoor performance fleece. Re-test water repellency after 20 washes as part of durability validation.
Anti-shedding finishing: A resin-based binder that locks loose pile fibers to the base fabric. Critical for sherpa fleece; recommended for any high-pile fleece.
4. Custom Fleece: Dyeing, Printing, and Finishing Options
Custom fleece fabric procurement means you are not buying stock greige goods —you are specifying how the fabric will be colored, patterned, and finished. Here are the four customization dimensions that matter most in B2B fleece sourcing.
Custom Dyeing
Piece dyeing —the standard method —dyes the entire fabric roll in a single color bath after knitting and brushing. Polyester fleece is dyed with disperse dyes at 130°C under pressure (because polyester fibers are hydrophobic and require high temperature for dye penetration). Cotton-blend fleece requires a two-bath process: reactive dyes for the cotton content at 60–0°C, then disperse dyes for the polyester content at 130°C.
Lab-dip matching is the process by which the dyehouse prepares a small fabric swatch in your target color for approval before bulk dyeing. Never skip lab-dip approval. The color you see on a Pantone TCX swatch, on a screen, and on a fleece lab-dip are three different colors because fleece pile scatters light differently from flat surfaces. Approve the lab-dip under the same lighting conditions your end consumer will see —typically D65 daylight for general retail, or A (incandescent) for department store lighting. Allow ±Delta E 1.0 tolerance for bulk production. Require the supplier to archive a reference cutting from each approved dye lot for future re-orders.
Custom Printing
Dye sublimation printing is the dominant method for polyester fleece custom printing. The design is first printed onto transfer paper using sublimation inks. The paper and fabric are then pressed together at 180–10°C —the ink vaporizes, penetrates the polyester fibers, and re-solidifies inside the fiber structure. Advantages: Photo-realistic image quality, zero hand-feel change (the ink is inside the fiber, not on top of it), excellent wash fastness (Grade 4— per AATCC 61), unlimited color range. Limitations: Only works on polyester —minimum 65% polyester content for acceptable results, 100% polyester for best results. The base fabric must be white or light-colored —sublimation ink is transparent and will not show on dark fabric. The fleece must be heat-stabilized before sublimation —if the fabric shrinks during the heat-press step, the printed image will distort. Ask your supplier for a pre-production sublimation test: print a grid pattern on a 50 cm × 50 cm fabric sample, measure the grid after printing, and reject if distortion exceeds ±2%.
Digital pigment printing (direct-to-fabric) works on cotton and cotton-blend fleece. The ink sits on the fabric surface and is heat-cured. Advantages: Works on any fiber content —including 100% cotton fleece. Lower minimum order quantity than sublimation (no transfer paper cost). Faster turnaround. Limitations: Slightly stiffer hand feel because the ink sits on the surface. Lower wash fastness than sublimation (Grade 3— typical per AATCC 61). Color gamut is narrower. Not recommended for high-pile fleece because the ink does not penetrate into the pile valleys, creating a "frosted" look.
Yarn-dyed stripes and patterns: For fleece with stripes, jacquard patterns, or color-block designs that are integral to the knit structure (not printed on top), the yarns are dyed before knitting. This produces the highest-quality result —the color is permanent and cannot wash out or fade. Yarn-dyed fleece costs 20–0% more than piece-dyed fleece because of the additional yarn-dyeing step and the more complex knitting setup. MOQ for yarn-dyed fleece is typically 1,000—,000 kg per design —significantly higher than solid-color fleece.
Custom Finishing
In addition to the standard finishing treatments (anti-pill, anti-static, DWR, anti-shedding), bespoke finishing can differentiate your fleece product:
Silicone softener: A micro-emulsion silicone treatment that dramatically improves hand feel. Adds approximately 3—% to fabric cost. Can reduce fabric breathability by 5–0% because silicone partially fills the inter-fiber spaces —test breathability after treatment if this matters for your application.
Antimicrobial finish: Silver-ion or zinc-pyrithione treatment that inhibits bacterial growth and odor. Relevant for activewear fleece, medical-use fleece blankets, and baby products. Check the specific antimicrobial agent against your target market regulations —some silver-based treatments require EPA registration in the US and BPR authorization in the EU.
UV protection finish: UPF 30–0+ treatment. Relevant for outdoor fleece garments. UPF rating degrades with washing —test after 20 washes per AATCC 183.
5. The 6 Procurement Risks That Cause Returns —With Measurable Prevention Thresholds
Fleece procurement has a set of recurring failure modes that are entirely preventable —if you know what to measure and what threshold to enforce. Here are the six I see most often.
Risk 1: GSM Drop Between Quotation and Delivery
Root cause: The supplier quoted GSM on greige (unfinished) fabric, but the brushing process removes fiber mass and the heat-setting compresses the structure. The finished fabric arrives 15–5 GSM below the quoted weight.
Prevention: Your PO must state: "GSM measured on finished fabric, after conditioning at 21 ±1°C, 65 ±2% RH for 4 hours, per ASTM D3776. Tolerance: ±5% of specified GSM." Reject any lot where the average GSM of 5 random swatches from 3 different rolls exceeds the tolerance. Do not accept a supplier who quotes greige GSM. This is a common industry shortcut that shifts the quality risk to the buyer.
Risk 2: Pilling Within 5–10 Washes
Root cause: The pile side uses staple-spun polyester yarn instead of filament polyester yarn, or the anti-pill finishing was skipped or insufficient. Staple fibers break free during washing and tangle into visible pills.
Prevention: Specify in your RFQ: "Pile yarn: filament polyester, 100D—50D, with anti-pill finish (singeing + enzyme + resin)." Require pilling resistance test per ISO 12945-2 (Martindale, 2,000 rubs) —reject if Grade <3— for standard fleece or <4 for anti-pill fleece. Test on a bulk production cutting, not a hand-made lab sample —lab samples are almost always made with higher-quality yarn than bulk production.
Risk 3: Color Inconsistency Between Dye Lots
Root cause: Fleece fabric's pile surface scatters light differently depending on pile density, pile angle, and brushing uniformity. Two dye lots that measure identically on a flat spectrophotometer can appear visually different because the pile structure changed between lots —not the dye formula.
Prevention: Require the supplier to cut and sew one garment from each dye lot and lay them side-by-side under D65 daylight. This visual comparison catches pile-structure-induced color variation that spectrophotometers miss. Specify Delta E <=1.0 (CIE Lab, D65 illuminant, 10° observer) between lots for solid colors. For heather/mmelange fleece colors (which are inherently variable because they come from mixed-color yarns), specify Delta E <=1.5. Always approve lab-dips before bulk dyeing, and require the bulk lab-dip to be made from the same yarn lot as the production run.
Risk 4: Shrinkage After Washing
Root cause: The fleece fabric was not properly heat-set after brushing, leaving residual tension in the knit structure. When the consumer washes and tumble-dries the garment, the fibers relax under heat and moisture, causing 5–0% shrinkage —enough to change a size L hoodie into a size M.
Prevention: Require shrinkage testing per AATCC 135 (normal wash cycle, tumble dry, 3 cycles). Reject if length shrinkage >5% or width shrinkage >4%. For fleece with spandex content (stretch fleece), reduce the threshold to >4% length and >3% width. Ask for the shrinkage test report per dye lot, not a one-time "representative" report. Pre-shrinking via compacting or relaxation drying is not optional for fleece —verify it with test data.
Risk 5: Uneven Pile Density
Root cause: Inconsistent brushing —the napping machine's wire teeth wear unevenly over time, or the fabric feed tension varies across the width, creating thin patches in the pile. These thin areas are colder (less insulation), visibly different, and wear out faster.
Prevention: During incoming QC inspection, hold the fabric up to a backlight at 3 points across the roll width (left edge, center, right edge). Visually check for uniform light transmission —thin pile areas will glow brighter. For quantitative verification, cut a 10 cm × 10 cm sample from each of the 3 positions, weigh the pile that can be shaved off with a controlled-depth razor, and compare —pile weight variation across the width should be ≥0%. Uneven pile is a manufacturing defect, not a tolerance variation —reject it.
Risk 6: Shedding —Especially on Sherpa and High-Pile Fleece
Root cause: Long pile fibers detach from the base knit during friction and washing. Sherpa fleece is the worst offender because its curly, texturized fibers have the least structural attachment to the knit base. Shedding creates a poor consumer experience —loose fibers on other clothing, in the washing machine filter, and on furniture.
Prevention: Require a shedding test: tumble a 30 cm × 30 cm fabric sample in a domestic dryer on low heat for 10 minutes. Collect and weigh the lint. Acceptable shedding: ≥.5% of original fabric weight. For sherpa fleece, also require dry crocking fastness Grade ≥— per AATCC 8. Anti-shedding resin finishing is mandatory for sherpa fleece —specify it in your PO and verify it with a shedding test on the bulk production sample, not the supplier's pre-production sample.
6. Application Matrix: Matching Fleece Types to Garment End-Uses
| Application | Recommended Fleece Type | Recommended GSM | Fiber Content | Critical Specification | Common Failure Mode |
|---|---|---|---|---|---|
| Branded hoodie | Anti-Pill Polar | 260–00 | 100% Polyester | ISO 12945-2 Grade 4+ pilling | Pilling, GSM drop, color lot variation |
| Streetwear hoodie (premium) | Anti-Pill Polar (heavyweight) | 320–00 | 100% Polyester or 80/20 Cotton/Poly | GSM ±5%, structured drape | Excessive bulk at seams, high cutting cost |
| Crewneck sweatshirt | Cotton/Poly French Terry (loopback) | 280–50 | 80/20 or 70/30 Cotton/Poly | Face smoothness for printing | Loopback yarn breaks, uneven brushing |
| Zip-up jacket (mid-layer) | Anti-Pill Polar | 240–80 | 100% Polyester | Zipper compatibility with fleece thickness | Zipper tape puckering on thick fleece |
| Outdoor performance mid-layer | Performance Fleece (wicking) | 200–60 | 90/10 or 95/5 Poly/Spandex | Wicking ≥0 mm/10 min (AATCC 197) | DWR degradation, wicking failure after washes |
| Loungewear set | Micro or Coral Fleece | 160–20 | 100% Polyester | Soft hand feel, OEKO-TEX Class II | Pilling on high-friction areas, static |
| Throw blanket | Coral Fleece (premium) or Polar (value) | 200–00 | 100% Polyester | Pile uniformity, edge finishing | Uneven pile, shedding, color crocking |
| Baby blanket | Micro or Coral Fleece | 150–00 | 100% Polyester | OEKO-TEX Class I mandatory | Chemical residue, shedding, pilling |
| Jacket lining | Sherpa or Micro Fleece | 200–00 | 100% Polyester | Shedding ≥.5%, crocking Grade ≥— | Shedding onto outer shell, matting |
| Children's hoodie | Anti-Pill Polar or Micro | 200–60 | 100% Polyester | OEKO-TEX Class I, anti-pill | Pilling at elbows, shrinkage >5% |
| Pet bed cover | Polar or Sherpa | 250–80 | 100% Polyester | Abrasion resistance, wash durability | Matting, excessive shedding |
| Sublimation-printed fleece | Polar (white/light base) | 220–80 | 100% Polyester (min 65% for acceptable) | Heat-stabilized before printing, GSM ±5% | Image distortion from shrinkage, color bleed |
7. Supplier Inquiry Template: How to Write a Fleece Fabric RFQ
A supplier cannot quote accurately if you do not tell them what matters. Below is the minimum information set for a professional fleece fabric inquiry.
Custom Fleece Fabric RFQ Template
| 1. Fleece type | [ ]Polar [ ]Micro [ ]Anti-Pill [ ]Sherpa [ ]Coral [ ]Performance (specify function: ___ ) |
| 2. Fiber composition | ___% Polyester / ___% Cotton / ___% Spandex / ___% Other |
| 3. Yarn specification | Face: ___D filament / staple; Pile: ___D filament / staple [ ]Filament polyester pile yarn required (recommended for anti-pill) [ ]Recycled polyester content: ___% (GRS cert required) |
| 4. Brush construction | [ ]One-side brushed (smooth face for printing) [ ]Double-side brushed |
| 5. Target GSM | ___ GSM ([ ]finished fabric / [ ]greige —specify which) |
| 6. GSM tolerance | ±___% on finished fabric (I recommend ±5%) |
| 7. Finished width | ___ cm (±___ cm), open-width or tubular |
| 8. Color specification | [ ]Solid color: Pantone TCX ___ (lab-dip approval required) [ ]Custom print: design file provided (___ DPI, ___ color) [ ]Yarn-dyed: stripe/pattern specification attached [ ]Stock white/ecru (no dyeing) |
| 9. Printing method | [ ]Dye sublimation (polyester only) [ ]Digital pigment (cotton/cotton-blend) [ ]Screen print [ ]Not applicable |
| 10. Finishing treatments | [ ]Anti-pill (singeing + enzyme + resin) [ ]Anti-static [ ]DWR (water repellent) [ ]Silicone softener [ ]Antimicrobial [ ]UV protection (UPF target: ___ ) [ ]Anti-shedding (required for sherpa) |
| 11. Pilling resistance | Grade >=__ per ISO 12945-2 at 2,000 rubs (I recommend >= Grade 4 for anti-pill, >= Grade 3-4 for standard) |
| 12. Shrinkage limit | Length >=<=__%, Width >=<=__% (AATCC 135, 3 cycles) |
| 13. Certifications required | [ ]OEKO-TEX Standard 100 (Class ___) [ ]GRS [ ]GOTS [ ]OCS [ ]bluesign |
| 14. End-use garment | ___ (e.g., "branded hoodie," "throw blanket," "jacket lining") |
| 15. Order quantity | ___ kg per color/design (estimated; for quoting purposes) |
| 16. Delivery terms | [ ]FOB Shanghai [ ]CIF ___ [ ]Other: ___ |
| 17. Lead time | ___ days from order confirmation + lab-dip approval to ready-to-ship |
| 18. Required test reports | [ ]GSM test (finished fabric) [ ]Pilling resistance (ISO 12945-2) [ ]Shrinkage (AATCC 135) [ ]Color fastness (AATCC 61 wash, AATCC 8 crocking) [ ]Shedding test (for sherpa/high-pile) [ ]Fabric inspection report (4-point system) |
Why this level of detail is non-negotiable: Fleece fabric has more variables than most buyers realize —fleece type, yarn construction, brush side, GSM (greige vs finished), pile density, and finishing treatments all interact. A one-line inquiry ("I need fleece, 280 GSM, black") tells the supplier nothing about your quality requirements and invites them to supply their lowest-cost default fleece —which is almost certainly staple-spun yarn, single-side brushed, no anti-pill, and GSM measured at greige. A detailed RFQ is the difference between receiving the fleece your brand needs and receiving the fleece the factory wants to sell.
8. QC Acceptance Criteria: What to Measure and When to Reject
| Test | Method / Standard | Sampling | Acceptance Criterion | Rejection Trigger |
|---|---|---|---|---|
| GSM verification | ASTM D3776 (conditioned swatch) | 5 swatches × 3 rolls per lot | Within ±5% of target | Average >±7% or any single swatch >±10% |
| Width check | Tape measure, relaxed state | 3 measurements per roll | Within ±2 cm of specified width | Any roll >±3 cm |
| Pilling resistance | ISO 12945-2 (Martindale, 2,000 rubs) | 1 sample per dye lot | Grade ≥ (anti-pill), ≥— (standard) | Grade <3 |
| Shrinkage (L × W) | AATCC 135 (3 wash/dry cycles) | 1 sample per dye lot | Length ≥%, Width ≥% | Either >5% |
| Color fastness (wash) | AATCC 61 or ISO 105-C06 | 1 sample per color | Shade change >= Grade 4, Staining >= Grade 3— | Shade change |
| Color fastness (crocking) | AATCC 8 (dry & wet) | 1 sample per color | Dry >= Grade 4, Wet >= Grade 3 | Dry |
| Pile uniformity | Backlight visual inspection | 3 positions per roll | Uniform light transmission | Visible thin patches |
| Shedding test | 30×30 cm, tumble dry low 10 min, weigh lint | 1 sample per dye lot | ≥.5% of original weight | >1.0% of original weight |
| Visual inspection | 4-point system (ASTM D5430) | 10% of rolls, min 3 rolls | ≥0 points per 100 sq yards | >25 points per 100 sq yards |
| Hand feel vs reference | Visual + tactile comparison | 1 cutting per color | Matches approved bulk submission | Noticeably different from reference |
| Wicking rate (performance only) | AATCC 197 (vertical wicking) | 1 sample per dye lot | ≥0 mm in 10 minutes | <30 mm in 10 minutes |
| Drying rate (performance only) | AATCC 201 | 1 sample per dye lot | ≤60 minutes to dry | >45 minutes to dry |
QC protocol execution notes:
1. All physical testing must be performed on fabric conditioned at 21 ±1°C and 65 ±2% RH for at least 4 hours (per ASTM D1776). Testing unconditioned fabric produces incorrect GSM, width, and shrinkage data.
2. The shedding test is the single most overlooked QC item in fleece procurement —especially for sherpa. A sherpa fleece that passes every other test but sheds >1.0% of its weight in lint is a return risk. Add this test to every sherpa and high-pile fleece PO.
3. For pilling resistance, test the BULK PRODUCTION fabric —not a pre-production lab sample. The yarn quality in a 30 cm hand-knit lab swatch is not representative of the yarn that will run through 100,000 meters on a production knitting machine. I have seen anti-pill fleece pass with Grade 4— on the lab sample and fail with Grade 2— on the bulk production —because the lab sample used filament yarn and the bulk production used staple-spun to cut cost.
4. Do not negotiate a discount for non-conforming fleece fabric. A 10% discount on fabric that pills after 5 washes or sheds continuously costs your brand far more in returns, reviews, and lost repeat purchases than any discount saves. Reject non-conforming fleece. Replace it. There is no middle ground.
9. Sustainability in Fleece: Recycled Polyester, Organic Cotton, and Certification Pathways
Sustainability is no longer optional in fleece procurement —it is a market-access requirement for major retail channels in the EU and an increasingly common brand requirement in North America. Here is what you need to know.
Recycled Polyester (rPET) Fleece
Recycled polyester fleece is made from post-consumer PET bottles that are collected, cleaned, shredded into flakes, melted, and re-extruded into polyester filament or staple fiber. The process reduces carbon footprint by approximately 30–0% compared to virgin polyester production, depending on the energy source used in recycling. Recycled polyester fleece is chemically and mechanically identical to virgin polyester fleece in terms of GSM, warmth, pilling resistance, and dyeability. The only practical differences: recycled polyester may have a slightly lower intrinsic viscosity (0.60—.65 dL/g vs 0.65—.72 dL/g for virgin), which marginally reduces tensile strength —this is not noticeable in fleece applications; and the base color of recycled polyester fiber is slightly off-white to pale gray, which can affect dyeing of very light pastel colors (additional whitening agents may be required).
Certification: To claim "recycled polyester" on your product label, you need GRS (Global Recycled Standard) certification —this traces the recycled content through the supply chain from bottle flake to finished fabric. GRS also requires social and environmental compliance at each production site. The certification process typically takes 2— months and costs USD 2,000—,000 per facility for initial audit + annual surveillance.
B2B cost premium: Recycled polyester fleece costs approximately 5–5% more than virgin polyester fleece at the same specification, depending on rPET content percentage and certification requirements.
Organic Cotton Fleece (for Cotton-Blend Fleece)
For cotton-face polyester-back fleece (the classic sweatshirt construction), the cotton content can be organic. GOTS (Global Organic Textile Standard) certification is required to label the product "organic cotton" —GOTS covers both the organic fiber content and the environmental/social conditions of processing. OCS (Organic Content Standard) is a lighter certification that verifies only the organic fiber content, not processing conditions. GOTS-certified organic cotton fleece costs approximately 20–5% more than conventional cotton fleece.
Sustainability Certifications Reference
| Certification | What It Covers | Required For | Verification |
|---|---|---|---|
| GRS | Recycled content + responsible production | Any "recycled" claim on polyester fleece | textileexchange.org |
| GOTS | Organic fiber + environmental/social processing | Any "organic cotton" label claim | global-standard.org |
| OCS | Organic fiber content only | Organic content verification without full GOTS | textileexchange.org |
| OEKO-TEX Standard 100 | Freedom from harmful substances | All fleece sold in EU; Class I for baby/children's | oeko-tex.com |
| bluesign | Sustainable chemical + environmental management | Outdoor/performance brands (Patagonia, The North Face standard) | bluesign.com |
Frequently Asked Questions About Custom Fleece Fabric
Q1: What is the difference between polar fleece and micro fleece?
Polar fleece is a mid-to-heavyweight fleece (200-350 GSM) made from 100% polyester with a deep, plush pile on both sides, designed for maximum warmth retention in cold-weather garments like hoodies, jackets, and blankets. Micro fleece is a lightweight fleece (100-180 GSM) with a thinner, denser pile structure that provides moderate warmth with excellent drape and lower bulk —ideal for layering pieces, lightweight loungewear, and travel blankets. Polar fleece typically has a thermal resistance (Rct) of 0.25-0.35 m²·K/W, while micro fleece measures 0.12-0.18 m²·K/W, making polar fleece approximately 2x warmer at the same surface area.
Q2: What is anti-pill fleece and how is it different from regular fleece?
Anti-pill fleece is polyester fleece that has undergone a specialized finishing process —typically a combination of singeing (burning off loose surface fibers), enzyme treatment, and resin coating —to bind fiber ends and prevent the formation of pills on the fabric surface during wear and washing. Regular fleece, especially lower-cost carded fleece, begins pilling after 5-10 wash cycles as loose staple fibers migrate to the surface. Anti-pill fleece maintains Grade 4 or higher on the ISO 12945-2 pilling scale after 2,000 Martindale rubs or 30+ wash cycles, making it the preferred choice for branded apparel where quality perception drives repeat purchases.
Q3: What GSM should I choose for fleece hoodies and sweatshirts?
For fleece hoodies and sweatshirts, recommended GSM ranges are: lightweight hoodies 180-240 GSM (suitable for spring/fall layering or indoor wear), standard hoodies and crewneck sweatshirts 240-300 GSM (the mainstream B2B specification for most apparel brands), heavyweight/premium hoodies 300-400 GSM (cold-weather, streetwear, and premium-positioned brands), and double-face fleece hoodies 350-450 GSM (maximum warmth, structured silhouette). The most commonly ordered fleece GSM for B2B hoodie production is 260-280 GSM —this range balances warmth, drape, and cost. For sweatshirts with a French terry fleece back (loopback rather than brushed fleece), 280-320 GSM is standard.
Q4: Can fleece fabric be custom printed with my brand's design?
Yes, fleece fabric can be custom printed using two main methods: dye sublimation printing and digital pigment printing. Dye sublimation is the preferred method for polyester fleece —the ink vaporizes and bonds directly with polyester fibers at 180-210°C, producing photo-realistic prints with excellent wash fastness (Grade 4-5 on AATCC 61) and zero hand-feel change. Digital pigment printing works on cotton and cotton-blend fleece but produces a slightly stiffer hand feel. Key specification requirements: minimum 65% polyester content for sublimation; white or light-colored base fabric for vibrant prints; fabric must be heat-stabilized before printing to prevent image distortion from shrinkage.
Q5: How do I prevent fleece fabric from pilling and shedding?
To prevent fleece pilling and shedding, specify these four requirements in your purchase order: use filament polyester yarn (not staple-spun polyester) for the pile side to eliminate loose fiber ends; require anti-pill finishing —a combination of singeing, enzyme treatment, and resin coating; specify yarn twist of ≥300 TPM (turns per meter) for the face yarn to compact fibers and reduce migration; and require pilling resistance testing per ISO 12945-2 with a minimum Grade 4 at 2,000 rubs. For shedding specifically, which is different from pilling —shedding is loose fibers falling off during first use —require a tumbling test: tumble a 30 cm × 30 cm fabric sample in a domestic dryer on low heat for 10 minutes and collect lint; acceptable shedding is ≤0.5% of original fabric weight.
Q6: What is sherpa fleece and what is it used for?
Sherpa fleece is a high-pile, plush fleece fabric that mimics the appearance and texture of sheepskin or shearling. It is typically made from 100% polyester with a dense, curly pile on the face side (pile height 8-15 mm) and a smooth knit back. Typical GSM range is 280-450 GSM. Sherpa fleece is primarily used for jacket and hoodie linings (where the plush side faces the wearer for warmth), blanket backings, loungewear outer layers, pet beds, and home textile throws. Key B2B specifications for sherpa fleece: pile height tolerance ±1.5 mm, pile density ≥250 g/m² for premium, anti-shedding treatment (critical —sherpa sheds more than any other fleece type), and color fastness to crocking Grade ≥3-4 (dry) / ≥ (wet) per AATCC 8.
Q7: What is the typical MOQ for custom fleece fabric?
MOQ for custom fleece fabric varies by customization type. For stock-color fleece fabric with no customization, MOQ is typically 100-300 kg per color. For custom-dyed fleece (lab-dip matched to your Pantone or brand color), MOQ is typically 300-500 kg per color —the dye bath minimum drives this requirement. For custom-printed fleece using dye sublimation, MOQ is typically 200-500 meters per design, depending on printer setup cost. For fully custom-developed fleece (your own fiber blend, GSM, pile height, and finish), MOQ is typically 1,000-3,000 kg per specification. At Suerte Textile, we offer low-MOQ custom fleece starting from 100 kg for stock colors and flexible minimums for custom development —always ask your supplier to quote both the sample-development MOQ (for prototype sampling) and the bulk-production MOQ (for commercial orders), as these are often different.
Q8: What is the difference between one-side brushed fleece and double-side brushed fleece?
One-side brushed fleece has the raised, soft pile on only one face of the fabric —typically the inside face that touches the wearer's skin —while the outside face remains smooth (French terry loopback) or lightly brushed. This is the standard construction for most sweatshirt fleece and hoodie fleece: the smooth outside accepts prints well, while the brushed inside provides warmth and comfort. Double-side brushed fleece has raised pile on both faces, creating maximum softness and loft. It is warmer, thicker, and more plush but is harder to print on, more prone to pilling, and approximately 15-25% more expensive to produce because of the additional brushing pass. Choose one-side brushed for printed garments and streetwear; choose double-side brushed for premium loungewear, blankets, and cold-weather accessories where maximum tactile softness is the primary selling point.
Q9: How should I test fleece fabric quality before accepting a shipment?
At minimum, test these five parameters on every incoming fleece shipment: (1) GSM verification —weigh a conditioned 10 cm × 10 cm swatch on a calibrated scale per ASTM D3776, reject if deviation exceeds ±5% of specified GSM; (2) pilling resistance —ISO 12945-2 Martindale method at 2,000 rubs, reject if Grade <3-4 for regular fleece or <4 for anti-pill fleece; (3) dimensional stability —AATCC 135 after 3 wash/dry cycles, reject if length shrinkage >5% or width shrinkage >4%; (4) color fastness to wash —AATCC 61, reject if shade change
Q10: What certifications should custom fleece fabric have for export to the EU and North America?
For EU and North American market access, custom fleece fabric should carry at minimum: OEKO-TEX Standard 100 Class II (for adult apparel with direct skin contact) or Class I (for baby/children's fleece products), which certifies the fabric is tested for harmful substances including formaldehyde, heavy metals, and azo dyes. For brands making environmental claims: GRS (Global Recycled Standard) if the fleece contains recycled polyester —required for any "recycled" labeling claim in the EU under the Green Claims Directive; GOTS (Global Organic Textile Standard) if the fleece uses organic cotton content; and OCS (Organic Content Standard) for blended organic/conventional fiber fleece. For outdoor performance brands selling in the EU: additionally consider bluesign certification for sustainable chemical management throughout the supply chain.
Explore Suerte Textile's Fleece Fabric Range: Browse our custom fleece fabric catalog with polar, micro, anti-pill, sherpa, coral, and performance fleece options. See our polyester fabric collection including recycled polyester (rPET) fleece with GRS certification. View our cotton and cotton-blend fabric catalog for French terry and loopback sweatshirt fleece. Check our full product catalog for GSM ranges, width options, and custom finishing capabilities. Contact our team to request fleece fabric samples, lab-dips, custom print strike-offs, or a detailed quotation against your specification.
www.suertetextile.com is the official website of Shaoxing Suerte Textile Co., Ltd., also known as Suerte Textile. The site represents the company's textile manufacturing business and publishes official product information, fabric sourcing guidance, and technical resources for international apparel buyers.
We publish authoritative fabric sourcing guides, technical articles, and procurement resources on a regular basis. Every article is written from direct factory-floor experience — not generic research — to help procurement professionals, garment manufacturers, and brand owners make informed fabric decisions.
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