RPHA 91 Solid File:Flag of Ecuador.png. 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: D. O. T. Approved 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 Visor 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)