Flexible 3D mohawk Awesome printed graphics and colors Adjustable straps and aerodynamic cooling vents Recommended for kids 5-8 years old, 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 doesn't fit can be dangerous Complies with the U.S. CPSC Safety Standard for Bicycle Helmets for Persons Age 5 and Older. CPSC & ASTM certified Shock-absorbing EPS inner shell protects the noggin Aerodynamic cooling vents keep your bucket fresh Molded 3D helmet design rocks every kid's world Nylon straps adjust for a great fit