Bio-Based Nylon for Activewear: Chemistry, Sourcing, MOQ

1. What "bio-based nylon" actually means at the chemistry level

Nylon is polyamide. Every nylon polymer is a chain of amide bonds connecting monomer units. Conventional nylon 6 uses caprolactam derived from petroleum. Conventional nylon 6.6 uses hexamethylenediamine and adipic acid, both petroleum-derived. Both chemistries have dominated activewear for six decades because they combine tensile strength, elastic rebound, and dye-take in a single fiber family.

Bio-based nylon replaces the petroleum monomer with a plant-derived monomer. The commercial answer at scale in 2026 is PA6.10, produced by pairing hexamethylenediamine with sebacic acid, where the sebacic acid is derived from castor oil.

PA6.10 is the same chemistry Fulgar uses in its EVO fiber line. It is not lab-scale. It is a fiber family that has been in commercial production for over a decade, primarily in Italy and China. OHZEHN-TEX is not asking a brand to bet on a novel polymer; it is a proven chemistry paired with a proven Fuzhou manufacturing base.

2. Why PA6.10 for activewear specifically

Not every "bio-based" performance fiber is right for activewear. Chemistry family drives end use. Three attributes matter for activewear, and PA6.10 wins on all three.

• Stretch and rebound. Compression leggings need a fiber that snaps back after a stretch cycle without permanent elongation. Polyamide rebound is measurably higher than bio-polyester rebound.
• Compression retention. A high-compression leggings program stretches out at the knee within weeks if the base fiber is not right. PA6.10 holds compression through the wear-and-wash cycle in a way PBS-family polymers do not, not yet.
• Opacity at low GSM. Bio-nylon delivers face density with less mass than bio-polyester, which matters for premium-positioning brands specing 220 GSM leggings that still pass the squat test.

For a full head-to-head between OHZEHN-TEX (bio-nylon) and Kintra (bio-polyester), see the OHZEHN-TEX vs Kintra comparison.

3. PA6.10 vs bio-polyester (PBS/PBST) at the construction level

4. Sourcing bio-based nylon in 2026

Three sourcing routes exist for bio-based nylon.

1. OHZEHN-TEX™ (China). Made at our own mill in Fuzhou.
2. Fulgar EVO (Italy). Same PA6.10 chemistry family, Italian yarn spinning. Distribution weighted toward Italian and European knitters.
3. Solvay Amni Soul Eco (Brazil). Different play, not bio-based. Petroleum-derived PA6.6 with a biodegradation additive. Brazil-based, sold through Brazilian mill partners. Fits programs where end-of-life is the single non-negotiable and bio-based feedstock is not.

For US-based activewear brands, OHZEHN-TEX combines PA6.10 chemistry and our own mill in Fuzhou.

5. MOQ, pricing, and lead times

MOQ, pricing, and lead times are quoted against a real style on a call.

• Weights: OHZEHN-TEX comes in named weights: 180, 220, 260 P and Seamless.
• Samples: Samples are quoted against your style on the first call.

6. Coexistence with LYCRA and Creora, not replacement

A common founder question: does bio-nylon replace elastane? Not on its own. Elastane (LYCRA) is a stretch-specific fiber that delivers the 400 to 700 percent elongation that spandex-heavy garments rely on. Bio-nylon replaces the base yarn, not the stretch yarn.

Lycra EcoMade (recycled elastane, still petroleum-based) and Hyosung Creora Regen (recycled spandex, not bio-based) coexist with bio-nylon in the same construction if a brand is running a phased transition. Position them as the recycled-content upgrade to conventional spandex, not as plastic-free. A fabric with any spandex or elastane, EcoMade or otherwise, is not plastic-free at the strict definition.

7. Applications for this fabric

• Activewear: leggings, sports bras, performance tees.
• Intimates: seamless bras, bralettes, shapewear.
• Swim: swim bottoms, one-pieces, board shorts.
• Basics: premium base layers, essentials, stretch tees.
• Lingerie: bralettes, slips, sets.

8. Frequently asked questions