HJC RPHA 91 Carbon Solid HelmetThe RPHA 91 Carbon is HJCs new modular touring helmet that was engineered for all day comfort. The new Premium Integrated Matrix EVO Carbon shell (P. I. M. EVO Carbon) 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 new distortion free, HJ 37 visor and HJ V17 sun shield provide a clear