HJC 644-865 FG-17 Thrust Full-Face Motorcycle Helmet (MC-6F, X-Large) The race-ready helmet tested at Wind Tunnel Laboratory 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 X-Small to Small sizing, 2nd for Medium to Large sizing and 3rd for X-Large to XXX-Large 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