HJC Rpha 91 Helmet The Rpha 91 Helmet from HJC boasts beautiful, clean styling and features that make any ride more enjoyable. In an effort to make a modular helmet that is both extremely strong and exceptionally lightweight, HJC utilized the Advanced P.i.m. Evo shell technology with carbon fiber to enhance shock resistant performance. Features: Premium Integrated Matrix / P.i.m. EVO (Reinforcement materials including Carbon-Aramid Hybrid and Natural Fiber provide enhanced Shock-Resistant performance) Aerodynamic design shell reduces air resistance and provides stability at high speed Full front-to-back airflow, 5 intakes and 7 exhausts Pinlock Ready Hj-37 face shield Quick, Simple and Secure Visor Ratchet System Adjustable 3-step sunshield (Hj-V12) for optimized position Dark Smoke Sunshield Installed Interior with advanced anti-bacterial fabric provides enhanced moisture wicking and quick dry function Removable/washable crown and cheek pads Ready for 21B & 50B Bluetooth (sold separately) DOT approved