The Women's Durafast Diamondfit Swimsuit is made with 100% polyester and is 20 times longer lasting than traditional swimwear. Boasting four way stretch technology and UPF 50+, this Durafast swimsuit provides excellent freedom of movement and sun protection. Product Specs: Medium Neckline, Sleek/Flexible straps, Keyhole Back, Moderate Cut Leg, UPF 50+