polyester covered spandex yarn spandex covered yarn raw white S&Z air ... yarnSingle covered yarn and double covered yarnNylon covered spandex yarn and polyester covered spandex yarnThe spandex we use includes 20d, 30d, 40d, ... , dyed or dope dyed, and flat or textured.The polyester we use includes 50d, 75d, 100d, 150d, 200d, ... and small circular knitting machines and so on. polyester spandex covered yarn