Parallel or textured polyamide yarns can be employed for making the double go over. The double coated thread is used to make garments, underwear and hosiery of high quality and superb performance. One covered yarn requires wrapping a single layer of masking yarn close to a Main yarn, generally spandex. https://cashxaabb.blogdosaga.com/31716043/the-basic-principles-of-covered-elastic-yarn