Romper suit

A romper suit, commonly known as a babygrow in the UK (as a result of its suitability for babies), also recently termed a onesie, is a one-piece garment. Somewhat similar to a coverall, it is loose-fitting and usually has shorter legs that may be gathered at the end. Puffed pants are particularly associated with rompers. Rompers are usually meant as a combination of shorts and a shirt, though the term can include jumpers, one-piece bathing suits, overalls, and clubwear fashions.