Women's swimsuits are generally one-piece, bikinis or thongs. The most recent innovation is the burqini, a more modest garment designed for Muslim women, which covers the whole body and head (but not face) in a manner similar to a diver's wetsuit. These are an updated version of full-body swimwear, which has been available for centuries, but complies with Islam's traditional emphasis on modest dress. In Egypt, the term "Sharia swimsuit" is used to describe full-body swimwear.Swimsuits range from garments designed to almost completely cover the body to garments designed to reveal as much of the body as possible without actual nudity, the choice of garment depending on factors such as how much or how little sun protection the wearer desires, air and water temperatures, fashion trends, and modesty. Swimsuits can be skin-tight or loose fitting. They are often lined in front with a second layer of fabric if the outer fabric becomes transparent when wet.