Product Recommended Uses Cycling, Scooter, Climbing, Snowboard, Outdoor, SkateboardVehicle Service Type ScooterInner material: Expanded polystyreneOuter Material PolycarbonateAbout this projectSAFE PROTECTION FOR CHILDREN: The children's helmet is made of PC shell and thick EPS foam lining for impact resistance and durability to protect your child's head from bumps and abrasions.Adjustable Accessories: Size: 50cm-54cm, Weight: 330g. The light bike helmet for kids features adjustable shoulder straps and a rotatable dial, making it flexible to fit your child's head circumference.Well-ventilated: Toddler helmet with 11 vents ensures optimal airflow. The professional aerodynamic and ventilation design keeps children cool in high temperatures, allowing moisture to evaporate and reducing high body temperature caused by strenuous physical activity.WIDE APPLICATIONS AND IDEAL GIFT: Sports toddler helmets are compatible with many sports to keep your kids safe, such as outdoor skating, cycling, cycling, snowboarding, and scooter/balance bike riding. It is the best holiday gift for boys and children 2 to 5 years old girls as children's day gifts, Christmas gifts, birthday gifts and other holiday gifts.