The Razor Aggressive Youth Multi-sport Helmet is an excellent quality multi sport helmet in a classical design. Youth fits head sizes 21.5 to 23 inches. Your perfect choice for biking, skating or any other sport that requires protective headgear. On the street or in the half pipe the Razor Aggressive provides you with superior security and protection. The erogonmic designed padding and an additional pad set for the perfect individual fit guarantee ultimate comfort. The eleven vents keep your head cool at all times and the side release buckles make it a breeze to adjust and fasten your chin strap. Factory contact information at 1-800-451-KENT (5368) or www.kentbicycles.com.