337000-422. ABS Outer Shell With EPS LinerSweatsaver™ Fit PadsDual Certified: Complies with CE EN1078, U.S. CPSC Bike and ASTM Skate Safety StandardsIdeal for Biking, Skateboarding, In-line Skating/Rollerblading & ScootersIncludes 2 Sets of Fit Pads to Customize FitSizing:To ensure a perfect fit, measure the circumference of your head starting in the middle of your forehead and match it with the sizes below:XS/S: 48-54cm (18.9"-21.3")S/M: 55-58cm (21.7"-22.8")L/XL: 59-61cm (23.2"-24") Classic skate style helmet with Dual Certified protection for use with various action sports. A streamlined take on the classic skate helmet shape, with ABS shell, EPS Inner and Foam padding inserts that is a perfect combination of great style, fit and protection. Triple Eight Dual Certified EPS Helmet All Black