Part of the arena Team Line collection inspired by our swim champions and designed for the major swimming federations, the arena Team 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 provide maximum freedom of movement, 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. Every component of the STANDARD 100 by OEKO-TEX by OEKO-TEX labelled fabric has been tested for harmful substances and the article therefore is harmless for human health. The test is conducted by our independent OEKO-TEX partner institutes based on our extensive criteria catalog.