●Molded 3D helmet design rocks every kids world ●Shock-absorbing EPS inner shell protects the noggin ●Aerodynamic cooling vents keep your bucket fresh ●Nylon straps adjust for a great fit ●Recommended for children ages 5+, but will fit most heads measuring 50-54 cm. Always take a head measurement. Head sizes and shapes can vary, even within an age range. Using a helmet that doesnt fit can be dangerous ●Complies with the U.S. CPSC Safety Standard for Bicycle Helmets for Persons Age 5 and Older ●Shell: PVC Interior: expanded polystyrene foam