Whether they are riding a scooter or a bike or even a skateboard they need to be safe. This is where the Globber Junior Helmet comes in. Designed to fit head sizes from 51-54cm, it is easy to adjust using the spin dial at the back of the helmet. To ensure maximum comfort, there are 7mm foam pads inside the helmet and 11 air holes in the outer ABS shell. The matching nylon strap is also adjustable to allow it to fit a wide range of chins!For safety, Globber uses a special high-density foam similar to what is used in motorcycle helmets to ensure the highest impact protection for a junior helmet.