HJC FG-17 Valhalla Grey/Black Full Face Helmet - Large The race-ready helmet tested at Wind Tunnel Laboratory Advanced Kevlar and Fiberglass Matrix Composite Weave 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