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 standards Complete with the renowned Sweatsaver� Fit Pads for added comfort Adjustable Fit Dial System with reflective dial ensures a custom fit Grooved EPS for excellent air flow BMX/Skate ABS Hard Shell X-Small/Small (48-54cm 18.9 to 21.3`) White Dial AdjustUPC/EAN/GTIN: 604352033213