... used for socks,seamless underwear, jeans,denim air covered yarn mainly used for socks,seamless underwear, jeans,the sales ... specifications according to customers' demandThe spandex cover yarn our factory manufacture include air cover yarn ,it can be used as the ... 200FDY/40 spandex, 250FDY/40 spandex,Photo of air covered yarn factory: polyester yarn air covered spandex bare yarn 75D DTY+15D spandex