1) 40D spandex is covered by 150D/48F polyester, 2) Available for demin fabric, cotton fabric, 3) Air covered yarn - more info check here: https://www.textile-product.com/Spandex-Covered-Yarn-30172368/
Quick Brief
Type: Spandex YarnMaterial: Spandex / PolyesterPattern: RawStyle: Air Covered YarnTechnics: OtherUse: WeavingPlace of Origin: Shandong China (Mainland)Model Number: 40/150