ABS Outer Shell paired with patented Conehead EPS liner technology results in a lighter helmet with greater energy displacement on impact Dual Certified: Complies with U.S. CPSC Bike and ASTM skate safety standardsComplete with the renowned Sweatsaver⢠Fit Pads for added comfort Adjustable Fit Dial System with reflective dial ensures a custom fitGrooved EPS for excellent air flowBMX/SkateABS Hard ShellSM/MD 21.7 to 22.8` (55 to 58 cm)BlueDial AdjustUPC/EAN/GTIN: 604352033275