The term 'Prom Suit' is often used to refer to a formal suit, usually black or white, worn by men to formal events such as proms. The most common type of Prom Suit is the Tuxedo, which is a three-piece suit consisting of a jacket, trousers, and a waistcoat. The jacket is typically single-breasted with a shawl lapel, and the trousers are usually straight-legged with a satin stripe down the side. The waistcoat is usually made of the same material as the jacket and trousers.