HJC RPHA 91 Carbon Modular Helmet. Premium Integrated Matrix / P.I.M EVO CARBON: Carbon Fiber Outer Shell provides more lightweight and comfortable shell with enhanced shock-resistant performance. Aerodynamic Design Shell reduces air resistance and provides stability at high speed; wind tunnel-tested. Refine Freshness: Two (2) Intakes and two (2) Exhausts. Lower Vent provides air circulation at all times. Pinlock Ready HJ-37 Visor: Provides 99% UV protection, anti-scratch coated. Two-way Pivot Ratchet: Smooth ratchet movement and improved sealing. Push Release Visor Lock: More secure and convenient. Distortion-Free Visor (Shield).