An essential for all scooter and bike riders Adjustable spin dial for the perfect fit Extra padding for comfort and safety Air holes for increased ventilation This lightweight helmet is especially designed by Micro Scooters to give you all the safety features your child will need in a fun, simple and retro design. It's an essential accessory for pedal cycling, skateboarding, roller skating and micro scootering. This helmet has extra padding for comfort and a web strap for the best snug fit. It has air vents for ventilation a flexible adjustment wheel to help keep the helmet in place. This medium size fits 48-52cm. Please choose the size carefully after measuring your child's head at its widest point (about an inch above the eyebrows). Warning: Make no modifications to the helmet. Helmets can be seriously damaged by substances such as solvents, paints, adhesives and cleaning solutions. The helmet is made almost entirely of polystyrene and may be easily penetrated by sharp objects. No protective headgear can protect the wearer against all unforeseeable impacts.