A journey to school or just a neighborhood adventure, the Bell Axle is the ideal helmet to match your kiddo's ride. With its compact profile and 20 large vents, your youngster will stay cool as they cruise, while the easy one-handed adjustable dial fit system gives them unbeatable comfort. For the on the go kiddo, grab the Bell Axle. Complies with the U.S. CPSC Safety Standard for Bicycle Helmets for Persons Age 5 and Older.