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BRAND: 509 More Info: Upper vents for optimal airflow. Fidlock chinstrap strap closure for easy in and out. Perfect fit between helmet eyeport and 509 goggles. Camera mount compatible improved design. 509 helmet bag included. Weight: DOT FMVSS 218/ECE helmet as low as 1200 grams. Meets or exceeds DOT FMVSS 218 FMVSS 218 ECE 2205 safety certification standards. Elevate your game with the next-generation performance of the 509 Altitude 2.0 Offroad 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.