The tankini is a bathing suit combining a tank top, mostly made of spandex-and-cotton or Lycra-and-nylon, and a bikini bottom introduced in the late 1990s. This type of swimwear is considered by some to provide modesty closer to a one-piece suit with the convenience of a two-piece suit, as the entire suit need not be removed in order to use a toilet. Tankinis come in a variety of styles, colors and shapes, some include features such as integrated push-up bras. It is particularly popular as children's beachwear, and athletic outfit good enough for a triathlon. According to Katherine Betts, Vogue's fashion-news director, this amphibious sportswear for sand or sea lets users go rafting, play volleyball and swim without worrying about losing their top.