HJC RPHA-ST Knuckle Full Face Street Motorcycle Helmet (MC-4HF Neon Green, Large) Advanced PIM (Premium Integrated Matrix): A matrix of Carbon Fiber, Aramid, Fiberglass and Organic Non-Woven Fabric create a remarkably strong yet extremely lightweight shell designed for superior fit & comfort using advanced CAD technology Optically-superior Anti-scratch Pinlock face shield (HJ-20ST): Anti-Scratch coating providing 95% UV protection Pinlock insert included for the ultimate Anti-Fog system Innovative center shield locking mechanism RapidFire II Shield Replacement System: Quick, tool-less shield removal and installation One-Touch Integrated Smoke-Tinted SunShield (HJ-L1): 2 positions easy to use side lever, even with gloves on Quick and easy removal and installation with optional tinted shield available Patent Pending 11/335,8550 Max Air-flow Top Vent: Variable air flow is adjusted by glove-friendly intake vent