The Arena Women's Powerskin ST 2.0 Open Back Swimsuit is a high-performance bodysuit top designed for competitive swimmers. It is made from a combination of nylon and elastane, which provides a compressive fit and excellent muscle support. The open back design offers maximum freedom of movement and reduces drag in the water. This swimsuit top also features flatlock seams for enhanced comfort and durability. With its sleek and streamlined design, it is perfect for racing and achieving your best performance in the pool.