The child size helmet is recommended for riders 5–8 years old, but will fit anyone with a head measuring 50–54 cm.Adjustable Straps,Impact Liner Type - Expanded Polstyrene Foam,Shell Type - PVC Shell,Ventilation Type - Aerodynamic Cooling Vents.Super Rainbow Corn LEDThis mythical unicorn comes to life with its bright colors, printed heart graphics and LED lights that illuminate the 3D horn and mane!Bolt LEDThe Raskullz Bolt LED Fit System helmet has a light-up 3D fin hawk! Five LED lights illuminate the rubber mohawk with a steady light or flashing sequence.The lights are activated by a button located on the back of the helmet and will automatically turn off if left on.Flying AceThe Raskullz Flying Ace Fit System helmet is outta control. This helmet features a shield that can be worn up or down and has a sleek, easy-to-use fit system that offers an adjustable, secure fit with a quick turn of the dial, and amazing fighter jet pilot graphics.