Plied yarn is a thread made of two or more single yarns twisted together.Its endurance and wear resistance are better than single yarn.At the same time, the strands can also be combined and twisted in a certain way to obtain twisted strands, such as double-strand, three-strand and multi-strand.It is mainly used for sewing thread, braided thread or medium-thick and strong fabrics.Conventional strands are usually made of two or more single yarns of pure cotton or blended yarns twisted together. In recent years, fancy strands have been made of two or more different single yarns twisted together, such as pure cotton and blended yarns, flat yarns and slub yarns, flat yarns and filaments, etc.