HJC CS-R2 Seca Full-Face Motorcycle Helmet (MC-4, X-Large) Advanced Aerodynamic Polycarbonate Composite Sculptured Shell - Lightweight superior fit & comfort using advanced CAD technology ACS Advanced Channeling ventilation system - Full front to back airflow flushes heat and humidity up & out Optically Superior Anti-Scratch Face Shield; Hard coated 3D shield design provides 95 percent U.V. protection and Anti-Scratch coating; RapidFire HJ-09 shield replacement system; Quick, secure, tool-less removal and installation Proven reliability and easy to use system - 2-Stage shield closure mechanism - Compresses shield into eye port gasket providing an extremely secure seal Plush Nylex Interior - Fully Removable/Washable Interior Cheek Pads and Liner