Ultra-lightweight Structurally Enhanced Composite Fiber Weave (S.E.C.) helmet shell construction with special sound-absorbing polymers Dynamically variable resistance crush zone designed into EPS liner Advanced helmet EPS liner design allows unprecedented airflow to all areas of the helmet for maximum cooling effect Vari-flex visor can take a significant impact without damage to visor or graphics Ram air vent on front of helmet for cooling airflow Helmet liner and cheek pads are interchangeable for a custom fit and are removable and washable Anti-slip goggle pads Aerodynamic exhaust fin Race-approved by every major U.S. motorcycle race organization Storlek S 55-56