The Magneto Kids Skate Helmet is sized and designed specifically for kids. Made with a strong ABS shell and backed with a shock absorbing EPS core, the helmet is impact resistant and safety certified specifically for skateboarding according to the ASTM 1492-15 safety standard. An adjustable dial in the back ensures a secure fit for fast growing kids which allows the helmet to last longer. We've added some removable soft foam lining to make the helmet comfortable and easy to wear. The helmet also features vent holes in the top, front and back to keep things cool on hot summer days. This helmet fits head circumference 20"-21.75" and the recommended ages are 4-9.