Elevate your game with the next-generation performance of the 509 Altitude 2.0 Helmet featuring the latest in weight-saving design and breathable comfort. Trail or track, the Altitude’s bestselling package twists the throttle wide open on airflow with a 40% larger chinbar intake and rear exhaust vents to keep you cool no matter what. Top of the line in every way, it includes the Fidlock magnetic strap buckle for easy one-handed operation, plus GoPro mounting capability. DOT approved. Meets Federal Motor Vehicle Safety Standard 218 (FMVSS 218)