Suit designed for practice, competition and everything in between. World Aquatics Approved: Approved by World Aquatics for national and international swimming competitions. World Aquatics approved racing swimsuits have a unique FINA barcode printed on the swimsuit, making it easily identifiable to swimming officials. 100% Polyester: Mizuno's longest lasting and most durable material. Chlorine Resistant: For longer lasting material. Fade Resistant: For longer lasting color.