The general process of covering yarn is centered on the spandex which is then evenly wrapped and wound around on its outer layer by a main yarn. It can be divided into S twist or Z twist (Z twist is a clockwise turn, while S twist is a counterclockwise turn).
Can be customized according to customer demands in terms of changing the main yarn (functional yarn or color yarn) and the matching yarn (functional yarn) to create a unique SCY with S or Z twist