The world´s first cap featuring the IQfit profile, and designed using accurate head mapping data. This cap offers optimum comfort, outstanding hydrodynamic performance, an improved fit and ease of use. Use with Fastskin goggles to reduce drag by 5.7%. This product has been fully approved by FINA. Features: Developed as part of the world´s first Racing System, engineered cap, goggles and suit to work in harmony IQfit Technology designed using accurate head mapping data 100 % Silicone Reduces full body drag force by 3.4% Protects against Chlorine Fina Approved Use the Fit Point Marker to easily align your cap and Fastskin goggles. SpecificationsL: Composition: 100% Silicone