Raskullz helmets offer stylish head protection for your child for maximum safety while skating or biking. Each molded design has unique 3D features with bold and vibrant color printing. All Raskullz helmets have a shock-absorbing EPS inner shell and a fully adjustable chin strap to ensure a proper fit. Aerodynamic cooling vents will keep your child cool and comfortable in his or her outdoor adventures. CPSC 1203 Bike and ASTM 1492 Skate safety certified. For ages 3-5. Fits head sizes 18.9-20.5" (48-52cm). If you know how hard it is to get a child to wear a helmet, then you know why we invented Raskullz Helmets. Raskullz combines the latest in helmet safety technology with our exclusive toy-inspired characters. Raskullz Helmets are the first helmets that a child will WANT to wear, and parents will be happy to know they pass all CPSC and ASTM safety requirements!