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French Terry vs Fleece vs Brushed-Back: The OEM Fabric Guide for Sweatpants & Hoodies#
Every sweatpant and hoodie program starts with the same fabric decision — and most brands get it wrong in one of two directions. They pick full brushed fleece for a "premium" line and discover their customers are too hot indoors and the garment pills after five washes. Or they pick lightweight french terry to keep unit cost down and discover it reads as "thin" in unboxing videos and drapes like a T-shirt.
The confusion is understandable. On a supplier's spec sheet, french terry, brushed fleece, and brushed-back french terry can all show the same composition ("80% cotton 20% polyester"), the same GSM band, even the same knitting machine. The difference lives in what happens to the back of the fabric after knitting — and that single finishing decision drives warmth, drape, pilling, print compatibility, pattern making, and ultimately return rates.
This guide compares the three fabrics from the OEM factory side: construction first, then GSM-to-season mapping, pilling behavior and controls, garment construction impact, decoration compatibility, and finally a paste-ready spec template. If you are launching sweatpants, joggers, hoodies, or crewneck sweatshirts, this is the fabric decision framework.
Construction: Loop Back vs Brushed Pile vs the Hybrid#
All three fabrics start the same way — as a weft-knit terry fabric knitted on a circular machine, where the back side of the fabric forms loops (like a towel, but finer). What separates the three categories is the finishing line:
The loops are left intact. The back of the fabric is a field of tight, closed loops; the face is a smooth plain-knit surface. Nothing is brushed, sheared, or napped.
This makes french terry the most stable of the three: the loop structure adds bulk and absorbency without loose fiber, so the fabric keeps its structure, breathes well (air moves through the open loops), and has the cleanest, most sculpted drape. It is the default choice of the premium and streetwear segment — heavyweight french terry hoodies hang with visible structure rather than collapsing into softness.
The knitted terry goes through brushing (napping) — wire rollers tease the loop back into loose fiber — and usually shearing, which cuts that fuzz to an even pile height. The result is the soft, fuzzy, warm interior everyone associates with "sweatshirt."
That pile is an air trap, which is the point: brushed fleece is meaningfully warmer than terry at the same GSM. But the pile is also loose fiber on the fabric surface — the raw material of pilling. Fleece collapses and drapes softly, adds visual bulk, and insulates so well that it can be too hot for indoor wear or mild climates. Most mass-market sweatpants are brushed fleece, precisely because it feels softest in-hand at the moment of purchase.
The terry back is lightly brushed but not fully sheared — you keep visible loop structure with a softened, slightly fuzzed interior. It sits deliberately between the other two: warmer and softer than plain terry, more structured and less pill-prone than full fleece.
For brands, brushed-back terry is the most useful "three-season" fabric in the category: comfortable from early autumn through spring, and wearable indoors in winter where full fleece overheats.
Don't confuse brushed fleece with polar fleece
Polar fleece (and microfleece) is a completely different fabric: 100% polyester, knit and napped on both sides, no cotton face, usually a brushed double-side structure. It is warmer per gram and cheaper, but it looks and feels synthetic, pills differently, and cannot be DTG printed.
When this guide says "fleece," we mean sweatshirt fleece / brushed fleece — the cotton-face knit used in hoodies and sweatpants. If your line is actually polar-fleece loungewear, the print and compliance logic changes; treat it as a polyester garment, closer to our GRS recycled polyester loungewear guide.
GSM (grams per square meter) is the single most quoted number in sweatshirt sourcing — and the most misused, because the same GSM behaves differently across the three constructions. Brushed fleece at 320 GSM is warmer than french terry at 350 GSM, because the pile traps more still air than open loops.
The practical bands:
Why GSM alone lies. Two french terry fabrics at the same 320 GSM can feel completely different depending on yarn count (21s vs 32s), loop density, and whether the yarn is combed or carded. A tightly knitted 32s combed terry at 300 GSM will out-perform a loose 21s carded terry at 340 GSM in hand feel, pilling, and shape retention. This is why our spec template below pins yarn count, loop density, and finish alongside GSM — the same discipline we apply to Modal pilling control in loungewear.
Warmth vs Breathability by Fabric Construction
Relative index at comparable GSM (300-320) — higher warmth = warmer garment, higher breathability = better indoor comfort
Bar chart: French terry 320 GSM +4/10, French terry 320 GSM +8/10, Brushed-back terry 320 GSM +6/10, Brushed-back terry 320 GSM +6/10, Brushed fleece 320 GSM +8/10, Brushed fleece 320 GSM +3/10
Pilling is the number-one quality complaint in the sweatpant and hoodie category — ahead of shrinkage and seam failure. The three constructions rank clearly:
French terry — lowest tendency. No brushing means no loose surface fiber. The loops themselves hold tight; pills can only form from fibers working loose out of the yarn, which tight knitting and long-staple yarn minimize.
Brushed-back terry — medium. Light brushing loosens some fiber; partial shearing removes some of it. Better-quality mills compensate with denser knitting.
Brushed fleece — highest. The pile is loose fiber by design. Cheap fleece (short-staple or reclaimed cotton blends, coarse brushing, no shearing, no anti-pill finish) can pill visibly within a handful of washes.
This is the biggest lever. Anti-pill spun polyester is engineered with lower flexural rigidity — broken fibers curl back into the fabric instead of tangling into pills. In cotton-face fleece, specify long-staple combed cotton on the face and anti-pill polyester in the backing. Avoid carded short-staple cotton in any fleece destined for more than one season of wear.
A second shearing pass after brushing cuts the pile to a short, even height — short fibers cannot migrate and tangle. Singeing the face removes surface fuzz before it becomes pills. Both are cheap process steps that cheap factories skip; both belong in your tech pack by name.
Require ISO 12945-2 (Martindale) or ASTM D3512 (random tumble) pilling tests run after multiple wash cycles (e.g., after 5 washes), targeting grade 4+ on the 5-grade scale. Pilling on raw fabric tells you little — the pills that trigger returns appear after washing, when loose fibers migrate. Use a third-party lab (SGS, Intertek, or any ISO/IEC 17025-accredited lab) on production fabric, not the factory's pre-production sample.
For the fiber-level mechanics of why blends pill — and why the spec, not the fiber name, decides the outcome — see our guide on Modal pilling in loungewear; the same yarn-and-construction logic applies to cotton-poly sweat fabrics.
The fabric choice propagates into pattern making and trims — a cost most brands only see after sampling.
Drape and pattern shape. French terry holds a sculpted silhouette: boxy heavyweight hoodies, wide-leg sweatpants, and pleated or panelled designs all rely on the fabric standing slightly away from the body. Brushed fleece collapses toward the body and visually adds volume — patterns drafted for terry will look bulkier cut in fleece, and raglan and drop-shoulder seams read softer. If your design references vintage reverse-weave construction, you want terry; if it references cloud-soft athleisure, you want fleece.
Seams. All three fabrics are stable enough for standard overlock construction, but the interior finish matters for comfort: flatlock seams (or coverstitch) on sweatpants prevent the seam stack of a french terry from pressing into skin, while fleece's bulk makes flatlock nearly mandatory on side seams to avoid ridge lines under the pile.
Trims. Rib cuffs, hems, and collar bands should match the fabric's recovery. A common failure mode: heavyweight fleece bodies paired with lightweight 2x2 rib that relaxes within weeks, leaving bell-shaped cuffs. Specify rib weight proportional to body GSM (roughly 250-300 GSM rib for a 320 GSM body).
Shrinkage and torque. Cotton knits shrink 5-8% lengthwise without mitigation. Compacting (compactor pre-shrinking) and heat setting bring this to a spec of 5% or less after three wash cycles — write that number into the tech pack. Torque (spiraling of side seams) is controlled by balanced knitting and proper heat setting; it is a classic defect on cheap circular-knit fleece.
Decoration is where fabric choice and marketing plans collide. The full method comparison lives in our DTG vs DTF vs screen print vs embroidery guide; here is the sweat-fabric-specific view:
The practical rule: if your design is a detailed full-front DTG print, knit choice matters more than printer settings — a smooth 32s combed french terry face will out-print a lofty carded fleece every time. If your design is a small embroidered logo, any of the three fabrics at 280 GSM+ performs well, and embroidery on plush fleece carries the highest perceived value per dollar spent.
At the factory level, the cost stack for the three fabrics is:
Yarn cost (the dominant term): combed long-staple cotton costs materially more than carded cotton or CVC (chief value cotton, 60-80% cotton) blends; 100% polyester backing is cheapest per kilogram.
Process cost: brushing adds a pass, brushing + shearing adds two — typically 5-10% uplift over plain terry at equal GSM.
Weight: GSM is nearly linear in yarn consumption, so a 400 GSM fabric costs roughly a third more than a 300 GSM fabric in yarn, before the finishing uplift.
For a first program, the decisions that move landed cost most are composition and GSM band, not terry vs fleece. A 300 GSM CVC brushed-back terry jogger and a 300 GSM combed-cotton french terry jogger can differ more in cost than terry vs fleece at identical quality tier.
On MOQ: sweat fabrics are stock-supported by knitting mills in the standard compositions and GSMs, so cut-and-sew programs can start at 60 sets per style with stock fabric, while custom-knit fabric (your own yarn blend, loop density, or exclusive heather) triggers mill minimums typically in the 200-300 kg per color range. Plan custom knits for your second or third reorder, not your first drop.
This is the spec block we recommend brands put in a tech pack for a mainline three-season sweatpant or hoodie. Copy it, adjust the GSM and composition to your line, and hold your factory to it:
Factory Insider Tip:
Brands sometimes ask us to "match this 380 GSM fleece" sample from a competitor photo. Weight is the one thing you can see in a photo; composition, yarn count, and finish — the things that decide whether the garment pills in month two — are invisible. When benchmarking a competitor garment, buy it, wash it five times, and compare it against your sample after the same five washes. That is the comparison your customers actually experience.
Decision Framework: Which Fabric for Which Product#
XiaoTex is a loungewear and homewear OEM/ODM factory in Zhongshan, Guangdong — in the middle of the Pearl River Delta knitwear supply chain, with sweat-fabric knitting mills within an hour's drive. We run sweatpant and hoodie programs from 60 sets per style on stock fabrics, with in-house pattern making, flatlock and coverstitch finishing, and decoration coordination for screen print, DTF, and embroidery.
Every sweat-fabric order is specified the way this guide specifies it: yarn count and staple pinned, loop density defined, brushing and shearing named as process steps, shrinkage held to 5% or less, and pilling verified to grade 4+ per ISO 12945-2 / ASTM D3512 after wash. We do not hold OEKO-Tex or BSCI certification; instead we support third-party lab testing (SGS, Intertek, or any ISO/IEC 17025-accredited lab) on your production fabric, and ship order-level compliance documentation with every order.
If you are choosing between terry, brushed-back, and fleece for your next drop — explore our homewear manufacturing service, or send us your tech pack (or a competitor garment to benchmark) and we will return a fabric recommendation with a quoted spec.
Sources: PodPartner, Tasc Performance, HempSpring, White Cotton, and Brand-Stuff fabric guides on french terry vs brushed fleece construction and GSM bands; Reddit r/streetwearstartup community threads on fleece vs french terry selection for sweatpants; Rene Bassett 2026 hoodie fabric comparison; ISO 12945-2 (Martindale pilling) and ASTM D3512 (random tumble pilling) test standards; AATCC 135 dimensional change testing; XiaoTex factory internal QA data. Warmth and breathability indices are relative factory-side comparisons at comparable GSM; market figures are third-party estimates and may vary by yarn lot and construction.
