statement maker with bold graphics and full-length ventilation, the lightweight Rebel is a trend-setting designers favourite. Fashionable colors and designs suit riders who like to match their horses equipment while looking great and being comfortably protected. With built-in comfort features like the SureFit Pro system that adjusts to the shape of your head, youll see why this helmet has become a favorite. Key features include: low-profile graphics with Duratec matte finish, SureFit Pro system, mesh-covered vents, FlipFold removable washable liner with Air-Channel technology, ASTM/SEI certified, hat size and size or small head 6 5/8 - 7 | 20 3/4" - 22", Medium 7 - 7 1/4 | 22 - 22 3/4" Large 7 1/4 - 7 3/8 | 22 3/4" - 23 1/8" XLARGE 7 3/8 - 7 3/4 | 23 1/8" - 24 3/8"