Ages 5 and under. For first time riders, the Baby Boomer offers the safety needed to ease parents. A larger head covering at the back of the neck offers better protection in case of impact. - Weight: 9.9 oz/280 g - Certifications: CPSC-ASTM-CEN - Vents: 9 - Extended Coverage: A larger head covering for toddlers provides a better protection to the neck area in case of impacts. - V-Lock Divider: Sliding device to adjust strap position. - Airdry Padding: Adjustment padding for better comfort. - Reflector decals: Safety first! Reflective stickers allow enhanced visibility to be sure drivers will see you. - Comfort fit for carrier: The back of the helmet perfectly follows the shape of the head. This way, the child is more comfortable in various means of transportation. - Size: 6-6 1/2; 18 7/8 po - 20 1/2 po; 48-52 cm