The Best Fabrics for Custom Gym Wear & Activewear
By The Velocity Wear Team
Gym wear lives or dies on fabric. The wrong choice soaks up sweat, clings, chafes and looks tired after a month; the right one wicks moisture, moves with the body and holds its shape wash after wash. Whether you are building a fitness brand or kitting out a studio, here is how to choose the best fabric for custom activewear — and how to decorate it so the print lasts.
Why cotton alone struggles in the gym
100% cotton is soft and breathable, but it absorbs sweat and holds it, so it gets heavy, cold and slow to dry. For light, low-sweat sessions or a casual gym-to-street look it is fine — but for genuine performance you want a fabric that moves moisture off the skin.
The performance fabrics that work
- Polyester (moisture-wicking) — the activewear workhorse; lightweight, fast-drying and durable, with engineered wicking that pulls sweat to the surface.
- Polyester/spandex (elastane) blends — add 5–15% spandex for four-way stretch and shape recovery; essential for leggings, fitted tops and seamless wear.
- Poly/cotton performance blends — a softer, cotton-like hand-feel with much of the wicking and quick-dry benefit; great for training tees and casual activewear.
- Nylon/spandex — smooth, strong and abrasion-resistant; common in premium leggings and compression wear.
GSM and weight for activewear
Activewear GSM runs lighter than fleece. For training tees and singlets, 120–160 GSM keeps things breathable; for leggings and structured tops, 200–280 GSM gives squat-proof opacity and support. Always check opacity on lighter colours before committing to a bulk run.
Features that separate good activewear from great
- Flatlock or seamless seams to prevent chafing.
- Four-way stretch and shape recovery so garments do not bag out.
- Anti-odour or moisture-management finishes for high-sweat use.
- Gusseted construction in leggings for comfort and durability.
The right way to decorate performance fabric
Printing on stretchy, synthetic fabric is different from printing on a cotton tee. The two best routes:
- Sublimation — dye is fused into polyester so the design becomes part of the fabric; it cannot crack or peel, stretches with the garment and allows vivid all-over prints. Ideal for performance polyester.
- Stretch / athletic-grade transfers — heat-applied prints formulated to flex with the fabric without cracking; good for logos on blends and leggings.
- Embroidery — works for logos on heavier performance pieces, but avoid it on thin four-way-stretch fabric where it can pucker.
“Match the print to the fabric, not the other way around. A standard print that cracks on stretch fabric will sink your reviews faster than any design choice.”
Velocity Wear produces custom activewear in moisture-wicking polyester and stretch blends, decorated with sublimation and athletic-grade methods, from a low minimum with tracked delivery to the UK, USA and Europe. Send your tech pack or idea for a free quote.