Spandex covered nylon yarns are used on the highest quality sweater, socks,fabrics, etc. 40/70, 20/70. 30/70, etc we ... can make. We are professional on producing spandex covered ... from improved technolyge.Our Sapndex Covered yarn can be used on Socks, Seamless, Warp Knitting, Weft Knitting, and Tatting. Core-Spun Elastic ...