This re-designed Sierra helmet by Troxel features a low profile and a riveted nylon and leather Cordora covering. It features the SureFit Pro Fit system w/ elastic straps that self adjust to size and shape of your head and ultra-plush padding. It also has mesh-covered vents. It also has a moisture-wicking flip-fold removeable washable headliner with air-channel technology for rider comfort. It also features self-locking buckle. ASTM/SEI-certified.