Waternity is the Arena fabric built to last. Its extraordinary robustness will resist the effects of chlorine and sunlight. In addition, its softness and easy-dry properties make it perfect for regular pool use The Arena? Mast One Piece suit is perfect the swimmer who wants simplicity paired with excellent design. With a minimalist back and front lining, this suit is both durable and sleek. Minimalist light tech back. Skinny straps reduce tan lines. Front lined. High cut legs allow full range of motion. Durable Polyester fabric is chlorine and sunlight resistant. Silver Arena logo on left hip. 53% Polyester / 47% PBT. Imported.