<br>INTERNAL MATERIALS: our helmet for kids is made of EPS + Sponge, External materials: PVC. <br>Head circumference: 50-54cm,suitable age: 2-5 Years ,there is a extra lining,belt length adjustable <br>:Sufficient vents to ensure your child's won't get soaked. Health protected. <br>Weight:ultra-light weight, 230g(8oz),which won't oppress the child's head, can be easily carried out for many sports like cycling, scooter riding, skating & boarding. <br>:Vive shape helmet design rocks every kid's world, help them to know the animals,adjustable straps for a great fit.Perfect for many kids. <br>PREMIUM PROTECTION FOR YOUR KIDS <br>Are you constantly worrying about your kid whenever he/she is outdoor skating, cycling, snowboarding, or riding a scooter/balance bike? <br>Say goodbye to head injuries as our kids' bicycle helmet will keep your child safe from bumps and bruises. <br>The crank adjustment dial in the back of the helmet is adjustable to fit the user comfortably. <br>The adjustable Straps buckle is easy to fasten and release. <br>The interior pad provides effective shock absorption and sweat absorption makes you cool while wearing. <br>Suitable for occasions <br>Skateboard skateboarding <br>Roller rollerblading <br>Bicycle ride bike cycling <br>Balance bike <br>Balancing board