This lightweight helmet with a fun unicorn print, is especially designed by Micro Scooter to give you all the safety features your child will need. 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 and a flexible adjustment wheel to help keep the helmet in place. Size Guide Please choose the size carefully after measuring your child's head at its widest point (about an inch above the eyebrows). The small helmet will fit those who measure 51--54cm in head circumference, and the medium helmet will fit children with a head size of 55-58cm. 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.