Best Winter Fabrics for Clothing: Fleece, French Terry, Wool & Thermal Knits Compared
Winter is when fabric choices matter most. A summer tee can get away with an average fabric, but a winter hoodie, jacket or tracksuit is judged on warmth, softness and how it holds up after a season of washing. The wrong fabric means returns, bad reviews and a product that pills by January. This guide explains the main winter fabrics, how they differ, where each one works best, and what to put on your spec sheet so the factory builds the garment you actually want.
How Winter Fabrics Keep You Warm
Warmth mostly comes from trapped air. Fabrics with a brushed, looped or pile surface hold more air close to the body, which is why fleece feels warmer than a flat jersey of the same weight. Fibre matters too: wool insulates well and manages moisture, while polyester is light, quick-drying and a common choice for fleece. Weight (GSM) helps, but a heavy fabric is not automatically a warm one. Construction and finish count as much as grams.
The Main Winter Fabrics Compared
| Fabric | Typical weight | Feel and warmth | Best for | Watch out for |
|---|---|---|---|---|
| Brushed fleece (cotton or CVC) | 280β400 GSM | Soft, warm, cosy inner face | Hoodies, sweatshirts, tracksuits | Pilling, shrinkage if not pre-treated |
| French terry | 250β350 GSM | Smooth face, looped back, breathable warmth | Mid-season hoodies, joggers, co-ords | Less warm than brushed fleece |
| Polyester fleece (polar, micro) | 150β300 GSM | Very light and warm, dries fast | Zip-ups, linings, activewear layers | Static, less breathable, can look synthetic |
| Sherpa / teddy pile | 250β400 GSM | Fluffy, very warm | Jackets, linings, collars | Pilling and bulk |
| Wool and wool blends | Varies | Insulating, manages moisture | Sweaters, coats, scarves | Higher cost, care needs, can itch |
| Acrylic knit | Varies | Wool-like softness at lower cost | Sweaters, beanies, knitwear | Pills more than wool |
| Thermal / waffle knit | 150β250 GSM | Textured, traps air, stretchy | Base layers, thermal tops | Check stretch recovery |
| Quilted / padded shell | Shell plus fill | Warm for its weight, wind-resistant | Puffer jackets, vests | Needs correct fill, seams and testing |
Weights above are common industry ranges, not fixed rules, and mills vary. Always confirm the exact GSM and composition for your sample.
Fleece vs French Terry: The Choice Most Brands Face
Both have a looped back, but they finish it differently. Fleece is brushed so the loops become a soft pile, which gives the warmest, cosiest feel for cold weather. French terry keeps the loops, so it is lighter and more breathable, better for mild winters or layering. In a country or market with sharp winters, brushed fleece is the safer pick for hoodies. In places with short, mild winters, French terry sells for more months. Our knitting process guide explains how each is made, and our heavyweight hoodie guide covers the 400+ GSM end.
Choosing Fibre: Cotton, Polyester and Blends
- Cotton-rich fleece feels natural and soft, but is heavier and slower to dry.
- CVC (cotton-rich blend) fleece keeps a cotton feel and reduces shrinkage and pilling. It is a popular middle route.
- Polyester-rich fleece is lighter, cheaper and quick-drying, with less natural comfort.
For a deeper comparison, read our cotton, polyester and blends guide, and for how yarn quality changes feel, see combed vs carded cotton.
Layering: Match the Fabric to the Job
- Base layer: thermal or waffle knit, with stretch for a close fit. See our elastane guide.
- Mid layer: fleece, French terry or knit sweaters. This is where most hoodies and tracksuits sit.
- Outer layer: quilted, padded or wool coats for wind and cold.
What to Put on the Spec Sheet
“Warm winter fabric” is not a spec. Give the factory: exact composition (for example 80% cotton, 20% polyester), knit structure (brushed fleece, French terry), target GSM, finish (brushed, pre-shrunk, anti-pill), and the washing test you expect. Our tech pack guide shows where each item goes, and our handfeel guide explains how to judge softness on a sample.
Common Winter Fabric Mistakes
- Judging by weight alone. A 350 GSM flat fabric can feel colder than a 280 GSM brushed fleece.
- Skipping the wash test. Fleece that looks perfect new can pill or shrink after a few washes.
- Ordering too late. Winter stock sells in a narrow window. See our order deadlines and lead times guide.
- Over-specifying. A very heavy fabric raises cost and shipping weight; make sure your customer will pay for it.
Frequently Asked Questions
What is the warmest fabric for a winter hoodie?
Brushed fleece in a heavier weight is the usual choice, since the soft pile traps air. Sherpa lining adds more warmth but also bulk.
Is cotton fleece or polyester fleece better?
Cotton-rich fleece feels more natural and breathes better; polyester fleece is lighter, cheaper and dries faster. Many brands pick a cotton-polyester blend to balance both.
Can I order a small run to test a winter fabric?
Yes. Sampling starts from a 1-set MOQ and production from around 50 pieces per style, subject to fabric availability.
Want to develop a winter range? Start your private label project or send a wholesale inquiry with the fabric, GSM and styles you have in mind.