It mainly refers to yarns and yarns. Simple twist: a product made of two or more wires, monofilaments or yarns, joined by a single twisting operation. Twisted compound: a product consisting of two or more components (of which at least one simple twist) joined by other or other twisting operations. It is also said of a woolen fabric, generally combed, made of high torsion yarns, which gives it a particular resistance and nervous hand.