1) 40D spandex is covered by 75D/36F polyester Dty, 2) Available for underwear, knitting fabric, socks - more info check here: https://www.textile-product.com/Spandex-Covered-Yarn-10149612/
Quick Brief
Type: Spandex YarnMaterial: Spandex / PolyesterPattern: RawStyle: Covered YarnTechnics: Ring SpunUse: Knitting, WeavingTwist: 450TPMPlace of Origin: Shandong China (Mainland)Model Number: 40/75
Product Features:
1) 40D spandex is covered by 75D/36F polyester Dty
2) Available for underwear, knitting fabric, socks