The Disney Cars Child Multisport Helmet is designed to protect your child in style. It has top and rear vents to promote effective air circulation. This red helmet is made with a hard outer shell for extra protection for use during biking or skating. It is compliant with CPSC bike and ASTM-1492-08 skate standards. Recommended for ages 5-8. Fits head sizes 20.1-21.2" (51-54cm).