The 509 Altitude 2.0 Trail Helmet is now designed to be lighter, stronger, and more comfortable for those long trail rides. Made from hand lay-up fiberglass composite, the 509 Altitude Helmet is durable and features upper vents with closure for airflow control. You'll enjoy the convenience of the Fidlock magnetic strap buckle as it's easy to use one-handed, while the removable Pro-Series Breathbox provides complete protection throughout the different seasons. Be ready for challenging terrain with the 509 Altitude 2.0 Trail Helmet. Features:Specs: