Siro spinning: In Siro spinning, the spinning machine is fed by two separate rovings, maintained at a specific distance. After drafting, the front roller feeds out two single strands of yarn, which are then twisted into a single strand of yarn. Siro spinning is a special spinning process, producing fibreless, strong, and durable yarn with good piling effect. The Siro spinning method is commonly used to spin fibers such as rayon, modal, Tencel, soybean fiber and even cotton. Tay Hsin uses Siro spinning material in sports performance socks for added comfort and durability.