Activewear Fabrics Explained: Poly, Nylon, Sorona & Recycled — A Sourcing Guide

In activewear, the fabric is the product. Two pairs of leggings can look identical on a product photo and perform completely differently — one holds its shape and wicks sweat through a tough workout, the other pills, sags, and goes see-through on the first squat. The difference is the fabric spec, and it's the decision that most defines your brand's reputation.

This guide breaks down the performance fabrics we use for custom activewear, what each one does well, and how to choose the right one for your product.

The Four Properties That Matter

Before comparing fabrics, know what you're optimizing for:

1. Stretch & recovery — How much it stretches and how well it snaps back. Recovery is what stops bagging at the knees and seat.
2. Moisture management — Wicking sweat away from skin to the surface where it evaporates.
3. Opacity — Stays opaque under stretch. Non-negotiable for leggings and bottoms.
4. Durability — Resists pilling, abrasion, and chlorine/UV degradation over many wash cycles.

No single fabric maxes out all four. Your job is to match the fabric to how the garment will actually be used.

The Core Activewear Fabrics

Polyester / Spandex

The workhorse of activewear. Polyester is durable, fast-drying, holds color well, and is inexpensive. Blended with 10–20% spandex (elastane), it gains the stretch activewear needs.

• Best for: training tops, shorts, budget-to-mid leggings, gym tees.
• Strengths: durable, wicks well, color-stable, cost-effective, takes sublimation print beautifully.
• Watch-outs: can retain odor more than nylon; cheaper poly knits can feel less premium.
• Typical blend: 87/13 or 80/20 poly/spandex.

Nylon / Spandex

The premium feel. Nylon is softer, smoother, and stronger than polyester, with a buttery hand that customers associate with high-end leggings (think the "second skin" feel).

• Best for: premium leggings, sports bras, yoga, anything sold on softness.
• Strengths: soft hand, excellent strength and recovery, sleek matte finish.
• Watch-outs: higher cost than polyester; absorbs slightly more moisture so dries a touch slower.
• Typical blend: 82/18 or 88/12 nylon/spandex.

Sorona (Bio-Based)

DuPont's Sorona is a partially plant-based fiber (made in part from corn-derived materials) that brings softness and stretch recovery with a lower environmental footprint than conventional petroleum fibers. It's often blended to add a natural-feeling stretch and a sustainability story.

• Best for: brands with a sustainability position who don't want to sacrifice hand-feel.
• Strengths: soft, good recovery, partially renewable, strong marketing story.
• Watch-outs: higher cost; usually used as a blend component rather than 100%.

Recycled Performance Fabrics (rPET, ECONYL®)

Recycled polyester (rPET, from plastic bottles) and recycled nylon (ECONYL®, from reclaimed fishing nets and waste) deliver performance close to their virgin equivalents with a credible sustainability claim — increasingly a baseline expectation in activewear, not a bonus.

• Best for: any brand making a sustainability claim it needs to back up.
• Strengths: performance parity with virgin fiber, verifiable recycled content, strong with conscious consumers.
• Watch-outs: modest cost premium; ask for GRS (Global Recycled Standard) documentation to substantiate claims.

Quick Comparison

Fabric	Hand-feel	Durability	Cost	Sustainability angle
Poly/Spandex	Good	Excellent	$	rPET version available
Nylon/Spandex	Premium, soft	Excellent	$$	ECONYL® version available
Sorona blend	Soft, natural stretch	Very good	$$$	Partially bio-based
Recycled (rPET/ECONYL®)	Matches base fiber	Excellent	$$	GRS-certifiable

Don't Forget the Construction Details

Fabric choice is half the equation. These details determine whether the garment actually performs:

• Flatlock seams — lie flat against skin to prevent chafing during movement.
• Bonded / laser-cut waistbands — no-dig comfort and a clean, modern look.
• Gusset construction — a diamond panel at the crotch for range of motion and reduced seam stress (critical for leggings).
• Opacity test — always confirm the fabric stays opaque under full stretch with a physical squat test on the sample.
• GSM — heavier knits (240–280 GSM) feel more "sculpting" and opaque; lighter (180–220 GSM) feel airier but risk transparency if the knit is loose.

A Simple Selection Framework

• Premium leggings / sports bras sold on feel → nylon/spandex (or recycled nylon).
• Training tops, shorts, gym kit, team uniforms → poly/spandex (great for sublimation).
• Sustainability-led brand → recycled rPET/ECONYL® or a Sorona blend, with certification.
• Budget line → poly/spandex at a mid GSM.

Whatever you choose, order a sample and wash-test it. Performance fabrics reveal their true quality after 10–20 wash cycles — pilling, recovery loss, and color fade all show up there, not on day one.

Make Your Activewear With the Right Fabric

Potato Apparel manufactures custom activewear in poly/spandex, nylon/spandex, Sorona blends, and recycled rPET/ECONYL® — with flatlock seaming, bonded waistbands, and gusseted construction as standard. We send physical fabric swatches and a wash-tested sample before bulk, and provide GRS documentation for recycled fabrics.

• Custom Activewear Manufacturer — full performance-fabric capabilities, MOQ 50 pcs.
• Custom Joggers & Sweatpants Manufacturer — athleisure bottoms in fleece and performance blends.
• Custom Shorts Manufacturer — gym and training shorts with liner options.

Not sure which fabric fits your product and price point? Send us your design and target retail price, and we'll recommend a fabric and send swatches.