Krash Shark Finn Helmet CPSC & ASTM certified Molded Exotuff 3D helmet design Aerodynamic cooling vents Shock absorbing EPS inner shell Adjustable straps Fits heads 54-58 cm CPSC and ASTM Safety Certified Aerodynamic cooling vents keep your bucket fresh Adjustable Comfy Nylon straps adjust for a great fit Ages 8+ (Fits head 54-58cm) Shock-absorbing EPS inner shell protects the noggin