Spandex or elastane is a synthetic fiber known for its high elasticity, invented in 1959 by chemist Joseph Shivers, who worked for the DuPont Company.LYCRA ® is an elastomeric fiber created by DuPont in 1958 and now owned by INVISTA. It is not a tissue but one of the fibers forming a fabric. Its properties are to give elasticity and higher quality than other spandex. LYCRA ® fiber is a type of spandex or spandex but all non-branded elastanes LYCRA ®.When first introduced it revolutionized many areas of the textile industry. Today it is used mostly in sports due to its flexibility and lightness. This is a very long chain polymer consisting of at least 85% of segmented polyurethane (Spandex), obtaining continuous filaments which may be multifilament or monofilament.LYCRA ® fiber is used in conjunction with other fibers to produce fabrics to produce optimal underwear, women's clothing, socks. Also present in tights and stockings as well as sportswear and swimwear, and thanks to its elastic properties allows freedom of movement for athletes who use it. The items that have been made with LYCRA ® fiber in the composition of the fabric are synonymous with higher quality than those made elastanes convecionales.