The RPHA 91 is HJC's modular touring helmet that was engineered for all-day comfort. The new Premium Integrated Matrix EVO shell (P.I.M. EVO) provides enhanced shock-resistant performance and is lightweight by using reinforcement materials that include carbon-aramid, carbon fiber, glass fiber, organic non-woven fabric, and linen fiber (natural fiber). The distortion-free, HJ-37 face shield and HJ-V17 sun shield provide a clear and increased peripheral view for the rider. Designed to perfection, the chin bar locking system now has a hidden closure point that allows for smooth contact and less pressure on the cheek area. The RPHA 91's 3D-engineered low-noise interior and neck roll system reduces road noise significantly.