The Raskullz Block Hawk helmet features a large building block base mohawk that stretches from the front, to the back of the helmet! Add your own blocks to the 8 multi-color bricks included with the helmet to create your own custom mohawk! Take your creations for a ride on your bike, scooter , or skateboard. Recommended for ages 5-8 yrs. old with heads measuring 50-54cm. Complies with the U.S. CPSC Safety Standard for Bicycle Helmets for Persons Age 5 and Older. Also complies with U.S. ASTM Safety Standard for multi-impact Skateboard Helmets.