Specifications For the Spandex Covered Yarn with Cotton we can offer(Spandex+Cotton) 40s/40D,32s/40D,21s/70D,16s/70D High quality ... cotton spandex yarn, 20D,30D,40D,70D ... . we can produce various core yarn, such as cotton/poly core yarn, poly/poly core yarn, rayon/nylon core yarn, rayon/spandex core, viscose ...