Dual certification - complies with U.S. CPSC Bike and ASTM Skate safety standardsIncludes 2 sets of Sweatsaver™ liners to customize fitA portion of sales will be donated to the Tony Hawk Foundation to continue its mission of empowering youth through the creation of public skateparks in low-income communitiesBMX/SkateABS Hard ShellSM/MD 21 to 22-1/2` (53 to 57 cm)Teal Hologram10UPC/EAN/GTIN: 604352036528