Molded 3D helmet design rocks every kid's world Aerodynamic cooling vents Shock-absorbing EPS inner liner Nylon straps adjust for a great fit CPSC and ASTM Bike compliant Krash's Skull Swarm Helmet comes with plenty of attitude needed to be the raddest dude on the block! This skullacious spiked bike helmet features a graphic print design of black skulls on a green background. A spiky black strip running from the front of the helmet all the way over the crown and ending at the back of the head rounds out the look. CPSC and ASTM compliant. Fits heads 54-58 cm and recommended for ages 8-14.