UPF 50+ blocks ≥98% UV per AATCC 183. Physical knit density is permanent; chemical coatings lose 30-50% UPF within 15-20 washes.
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Phenolic yellowing: BHT packaging + NOx + alkaline pH. D083 anti-yellowing foam, ISO 105-X18 tested. BHT-free packaging spec.
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How spandex denier (20D vs 40D) controls nylon hand-feel, drape, recovery. D083 Air-Sculpt 34% spandex, AATCC 135.
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ISPO & Texworld 2026 activewear fabric trends: bio-circular nylon, tactile-performance hybrids, digital prints on D036 interlock.
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Anti odor activewear fabric per AATCC 147: silver-ion vs air-layer odor control, AATCC 100 wash durability, ASTM E96 MVTR.
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