The Altitude Carbon Fiber 2.0 R-Series Helmet is race legal across all forms of ISR racing events including Snocross, Hillcross, Grass Drags, Ice Racing, Hillclimb, Snowbike, Cross Country, and Watercross. The Altitude 2.0 R-Series helmet is part of 509's Racing collection, for aspiring podium seekers, local races, and Snow-bike series racers.