Spandex fabric is a polyurethane fiber. Because of its excellent elasticity, it is also named elastic fiber and is widely used in clothing fabrics. The elasticity of spandex is very high. Generally, 100% polyurethane is not used in general products, and 5%~30% is mixed in the fabric. The obtained spandex fabrics have 15%~45% comfortable elasticity.

Spandex fabrics are often made of composite yarns, that is, spandex is the core and other fibers (such as nylon, polyester, etc.) are used as the skin to make a core-spun elastic fabric. It has good adaptability to the body and is very suitable for tights. No sense of oppression. The appearance, style and wearing performance of the spandex elastic fabric are close to similar products of the outer fiber fabric covered.