... #,32#,37#,42#,52 2.Spandex,Polyester,Nylon Yarn 3.Single Layer,Two Layers Yarn 4.MOQ:1000KG WELCOME TO DONGXING BELT WEAVING ... Thread Introduction:Cover Material 1 Spandex yarn 70d,140d,280d,420d,560d,840dCover Material 2Polyester yarn 33dt/36f,100dt/36f,167dt/36f ... ,333dt/36fCover Material 3Nylon yarn 76dt/24f,144dt/48f Core MaterialImport latex 23#,32#,37#, ...