Lycra refers to a man-made stretch fabric made from elasticated yarns. It was introduction in 1958 and since then Lycra has proved an essential component in underwear and other figure hugging garments made popular in the 1980's, especially in sportswear. Moreover, Lycra is extremely elastic fiber made of synthetic fiber widely used in lingerie and all other types of clothing as it helps clothing to retain its shape while giving the clothing additional stretch and give.
Lycra is a DuPont trademark for its spandex fiber. Any time you see this fiber listed on a label, expect comfort, movement, and shape retention that do not wash away.