The shell of the RPHA 70 is made according to the P.I.M. construction (Premium Integrated Matrix), a technical fiber mix of Carbon / Kevlar and Fiberglass for maximum safety and durability. Aerodynamically optimized in HJC's own wind tunnel, no lift and perfect directional stability at all speeds. Max Air-flow ventilation system with glove-friendly operation. Removable and washable MultiCool™ lining, anti-bacterial and neutralizes unpleasant odors.