HJC FG-17 Mamba Full-Face Motorcycle Helmet (MC-4F, X-Large) Advanced Kevlar and Fiberglass Matrix Composite Shell; Lightweight, superior fit and comfort using advanced CAD technology For a perfect fit, FG-17 comes in 3 different shells; 1st shell for XS-S sizing, 2nd for M-L sizing and 3rd for XL-3XL sizing All sizes of cheek pads are interchangeable in all helmet sizes SilverCool Interior, Moisture-wicking and odor free liners with advanced anti-bacterial fabric - Crown and cheek pads are fully removable and washable Superior Fog Resistant Clear Pinlock Max Vision Shield (HJ-20M); New 3D design provides 95 percent UV protection, anti scratch coating and is prepared for the ultimate anti-fog Pinlock insert (sold separately)