Sankaku Channel/catsuit

A catsuit is a close-fitting one-piece garment that covers the torso and the legs, and frequently the arms. They are usually made from stretchable material, such as lycra, chiffon, spandex (after 1959), leather, latex, PVC, or velour, and frequently close using a zipper at the front or back.

Catsuits, which date from at least the 1940s, can be worn by both men and women, and, despite the name, do not generally have feline characteristics.

(source: Wikipedia)