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.