The Krash! Pro has a tough shell that covers the entire helmet to make it durable enough to withstand everyday abuse.It also includes an adjustable fit system to fit the head comfortably.The youth size helmet is recommended for riders 8–14 years old, but will fit anyone with a head measuring 54–58 cm.Helmet FeaturesMatte Finished Colouring,Adjustable Straps,Impact Liner Type - Expanded Polstyrene Foam,Shell Type - PVC Shell,Ventilation Type - Aerodynamic Cooling Vents,Size - Youth, Unisize 54-58cm.