A basic tee succeeds on hand-feel and price. Activewear succeeds — or fails — on performance specs most buyers have never had to define precisely: how it moves moisture, how far it stretches and recovers, how it breathes under load. Get the fabric brief wrong and no amount of pattern-making saves the product.
The performance properties that actually matter
- Moisture-wicking — fabric engineered to pull sweat away from the skin to the outer surface for faster evaporation, typically through fibre cross-section shape or a hydrophobic-inside, hydrophilic-outside construction.
- Stretch and recovery — measured as 2-way (stretches in one direction, usually width) or 4-way (stretches and recovers in both length and width) — 4-way stretch is standard for leggings and fitted training wear.
- Compression — controlled, engineered tension in the fabric and pattern that applies graduated pressure, distinct from simply using a very tight-stretch fabric.
- Breathability — usually engineered through mesh panelling, open-knit construction, or fabric with a more porous structure at zones with higher heat output.
- Quick-dry — a function of fibre type (synthetics generally dry faster than natural fibres) and fabric structure that limits water retention within the yarn itself.
- Anti-odour finishes — typically silver-ion or other antimicrobial treatments applied to slow the bacterial growth that causes odour in synthetic performance fabric.
- UPF (UV protection factor) — a rated measure of how much UV radiation a fabric blocks, relevant for outdoor-focused activewear.
| Fabric | Typical composition | Stretch | Best for |
|---|---|---|---|
| Polyester-spandex jersey | 88–92% polyester / 8–12% spandex | 4-way | T-shirts, general training tops, tights |
| Nylon-spandex (nylon/lycra) | 78–85% nylon / 15–22% spandex | 4-way, higher recovery | Compression leggings, swim-adjacent styles |
| Poly microfibre interlock | 100% polyester, tightly knit | 2-way | Base layers, lightweight running tops |
| Recycled polyester (rPET) | Recycled PET blended with spandex | 4-way | Sustainability-positioned activewear ranges |
| Bamboo-modal blends | Bamboo/modal with elastane | 4-way, softer hand | Studio wear, activewear-loungewear crossover |
Construction choices that affect performance as much as fabric
- Flatlock seams — sit flat against the skin rather than raised, reducing chafing on high-friction areas like inner thighs and underarms during movement.
- Four-way pattern engineering — panels cut and placed so stretch direction aligns with the body's actual range of motion, not just the fabric's default grain.
- Bonded vs sewn seams — bonded (glued or welded) seams reduce bulk and can be fully waterproof, but cost more and require specialised equipment; sewn seams are more common and more repairable.
- Mesh ventilation placement — placed at the body's highest heat-output zones (upper back, underarms) rather than decoratively, when genuinely performance-driven.
“The difference between activewear that performs and activewear that just looks like it is almost entirely decided before a single seam is sewn — in the fabric brief.”
Certifications worth asking about
OEKO-TEX Standard 100 matters more for activewear than for most categories, because stretch fabrics sit directly against skin during heavy sweating — exactly the condition under which residual chemical treatments are most likely to cause irritation. If sustainability is part of your brand story, ask specifically about recycled-content verification (not just a general "eco" claim) for any rPET fabric in your range.
Frequently asked questions
- What is the difference between 2-way and 4-way stretch fabric?
- 2-way stretch fabric stretches in one direction only, usually width. 4-way stretch fabric stretches and recovers in both length and width, which is why it's the standard for leggings and fitted training wear.
- What fabric is best for moisture-wicking activewear?
- Polyester and nylon-spandex blends are the most common, engineered with a fibre structure or coating that pulls moisture to the outer surface for faster evaporation. Natural fibres generally wick less effectively than engineered synthetics.
- What is compression fabric?
- Fabric and pattern engineered together to apply controlled, graduated pressure — distinct from simply using a very tight stretch fabric, which doesn't provide the same targeted support.
- Is recycled polyester as good as virgin polyester for activewear?
- Performance-wise, largely comparable when properly manufactured — the main differences are cost and the need to verify genuine recycled content rather than an unverified sustainability claim.
We manufacture activewear across polyester-spandex, nylon-spandex and recycled-content fabrics, with flatlock construction as standard. Tell us the performance properties your product actually needs and we'll spec the fabric to match.