... /40D,32s/40D,21s/70D,16s/70D High quality cotton spandex yarn, 20D,30D,40D,70D,105D,120D available. we can produce ... yarn, such as cotton/poly core yarn, poly/poly core yarn, rayon/nylon core yarn, rayon/spandex core, viscose/acrylic core yarn, and so on. cotton spandex yarn ...