The Tsunami Women's Challenge Back One-piece is perfect for intensive and competitive swimmers. It's made from an extremely chlorine-resistant swim fabric that protects skin from the sun, is quick to dry, and is super durable. The open back, in combination with the thin straps and high-cut leg, provides maximum freedom of movement, an excellent feel of water, and a flattering look. It comes in a solid colour with Arena's name on the hip. Lined through the front.