"Drip-dry" nylon, orlon and dacron, which could retain heat-set pleats after washing, became immensely popular. Acrylic, polyester, triacetate and spandex were all introduced in the 1950s.
"Nip-and-tuck" nylon, orlon, and dacron, capable of maintaining heat-set pleats through washing, gained immense popularity. In the 1950s, acrylic, polyester, triacetate, and spandex were also introduced.