The entire gloss inside of the hair loss maintains a stable fit. Thinner material provides a dynamic, wrinkle-free fit Comfortable wear with 100% silicone material It has excellent chlorine resistance and protects hair texture from chlorine in the pool. It is a FINA-certified product and records are recognized when wearing an official competition. Worn and loved by Speedo athletes, the Hiro Cap is the latest addition to the Fastskin range. Made for racing, its tight-fitting moulded design is engineered to reduce drag and includes a full gloss interior for improved grip as you power through the water. Created from thinner material for a dynamic, wrinkle-free fit, its moulded design enables it to hold its shape for a streamlined silhouette. World Aquatics Approved.