The Triple Eight Dual Certified Bike and Skateboard Helmet is the perfect blend of classic Triple Eight style, with unparalleled fit and protection. Dual-certified for both bike and skate, its ABS shell with impact-absorbing EPS foam liner is engineered for a close fit and low profile. Dual certified to comply with US CPSC Bike and ASTM F-1492 skate safety standards, it’s the ideal helmet for biking, skateboarding, inline skating and rollerblading, roller skating, roller derby, scooters, BMX, and other action sports. Two sets of moisture-wicking, stink-free Sweatsaver liners in two different sizes are included for a customized fit. Chin strap is adjustable and fastens with a side release squeeze buckle.?