Mystic MK8X Multisport Helmet Features: CE-certified for your safety. Specifically designed for water sports for optimal performance. Lightweight outer shell with ventilation system ensures comfort and coolness. Dial system for individual customization for perfect fit. 3D Mesh removable fit pads for extra comfort and support. Fidlock quick release chin buckle for easy operation. Removable ear cover compatible (not included) for customized protection. Size CM XS 56-57 S 57-58 M 58-59 L 59-60 XL 60-61