Enter the Slime-Zone with the Raskullz Slimeball helmet! The mythical cartoon dinosaur graphic is a fun creature who loves the wind in his awesome 3D rubber Mohawk! So fun that your little one will want to wear this helmet everywhere they go! Recommended for riders 5-8 years old with heads measuring 50-54 cm. 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.