1. The biggest advantage of spandex fabric is that it has good elasticity, it can be stretched 5-8 times without aging, spandex cannot be woven alone, it is generally woven with other materials, and the ratio of spandex is about 3-10%. Swimwear fabrics The proportion of spandex reaches 20%. Spandex fiber is a synthetic fiber with high elongation at break (above 400%), low modulus and high elastic recovery rate. 2. Spandex is a polyurethane fiber. Because of its excellent elasticity, it is also called elastic fiber. It has been widely used in clothing fabrics and has the characteristics of high elasticity.