A swimsuit, bathing suit, or swimming costume is an item of clothing worn while Designed to be Engaging in a water-based or water sports activity, Such as swimming, water polo, diving, surfing, water skiing, or in the sun DURING Activities s, such as sun bathing. A swimsuit Can be worn as an Also in sports undergarment That requires a wetsuit Such as water skiing, scuba diving, surfing, and wakeboarding. Also are worn swimsuits When There Is a Need to display the body, as in the case of beauty pageants or bodybuilding contests. Glamour photography and magazines like Sports Illustrated's annual "swimsuit issue" feature models and sports Personalities in swimsuits.

There is a very wide range of styles of modern swimsuits, Which Vary in relation to body coverage and materials.