Arena Silicone Racing Swim Cap Men and Women Aquaforce Wave Hydrodynamic Performance Competitive Intensive Swimming Pool Bathing Hat, Black, X-Large

World's fastest FINA-approved racing swim cap combines innovative 3D Aquaforce features and a unique design for the highest level of swimming performance and comfort Adult swim cap's unique wave structure design and advanced texture significantly reduce drag and total body hydrodynamic resistance for enhanced speed and performance in the water Inner anti-slip design with a thicker silicone band engineered into the cap opening prevents the swim cap from slipping off while you are swimming, so there's no need to double-cap Provides a tight but comfortable fit with no wrinkles and a high degree of compression resulting in top hydrodynamics, perfect for competitive swimmers while training or racing Premium soft-silicone construction prevents wrinkles, and provides maximum adhesion and outstanding protection against chlorine for the hair; NCAA/NFHS compliant