The sporty and extremely stretchy arena Thrice Swim Pro Back swimsuit for girls is part of the highly comfortable arena Feel collection and fits like a second skin. It is perfect for fitness and leisure swimmers engaged in all types of water activities in pools, at the beach, and in other aquatic environments. Made from chlorine- and saltwater-resistant MaxFit Eco material with integrated UV protection UPF50+. The 4-way stretch fabric offers a perfect fit, maximum freedom of movement, and an extremely pleasant wearing experience. It is the environmentally friendly evolution of arena's MaxFit material and contains recycled polyamide. Equipped with wide straps and an ergonomic back design for secure and comfortable support. Every component of the STANDARD 100 by OEKO-TEX® has been tested for harmful substances in OEKO-TEX® certified materials, ensuring that the product is harmless to human health. The testing is conducted by independent OEKO-TEX® partner institutes based on a comprehensive criteria catalog.