All Alliance SSR helmets come with Icon's Fog-Free shield and our quick release mechanism that has been noted as an industry leader is ease of use and durability. The shell of the Alliance SSR is the same injection molded polycarbonate/ABS blend that is has been in the past although upgraded over the original Alliance by passing the Snell M2005 standard as well as DOT. This shell features two Supervents that produce great venting but maintain a streamlined shape. Injection molded Polycarbonate/ABS shell for strength. Snell M2005 and DOT approved. Fully removable, washable liner. Wicking Hydra Dry liner material keeps rider cooler, dryer and more comfortable. Optically correct Fog free, anti scratch coated shield. Molded twin channel Supervent for increased cooling. Internal on/off cheek exhaust switch. Chin vent and breath deflector help exhaust moist air.