Description: - 【1 piece structure】: Bike Helmet for Kids's shell and lining are seamlessly integrated, providing your child with strong impact resistance and comprehensive protection during various activities - 【Adjustable fit system】: Kids Bike Helmet has a built in knob adjustment system and chin strap, this helmet can be easily adjusted to fit different head shapes safely and comfortably, ensuring a stable fit during activities - 【Ventilation design】: Cycling Helmet has scientific ventilation holes to enhance airflows, effectively discharge sweat and heat, keeping your child cool and comfortable when wearing it for a long time - 【Lightweight impact resistant material】: Child Bicycle Helmet is made of high density EPS PVC PP and nylon webbing, which has good shock absorption effect and can minimize the risk of injury during exercise - 【Multi functional use】: Bicycle Helmet is suitable for skateboarding, balance bike, cycling, roller skating, etc., designed for multiple sports, and its stylish design is attractive to children Size Chart: 19cmx25cmx14cm/7.48inchx9.84inchx5.51inch Adjustable head circumference:52cm-56cm/20.47inch-22.05inch Package Includes: 1 Kids Bike Helmet Note: Please allow slightly errors due to manual measurement and different monitors.