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. 1-piece swimsuit. Light-tech back design. Waternity® fabric: Sunlight resistant. Natural stretch. Low water absorption. Perfect fit. Chlorine resistant. 53% Polyester / 47% PBT.