1. PBT yarn 2. for socks, underwear, knitting fabric, weaving fabric and sweater Features:(1)PBT air covered yarn(2)Air-covering or traditional-covering(3)Produced with Japanese-made or Italian-made machinery(4)Draft ratio range:wide(low elasticity,medium elasticity,and high elasticity)(5)In various specifications according to customers' demands.Zhangjiagang hengmei textile Co Ltd is a ...