Low profile helmet fully certified for bike and skate use at all levelsDeep, comfortable fit with Protec`s most advanced, slimmest profile shell and modern, luxurious linerBacked by over 40 years of design innovation, Protec is the original skateboard protective gear brand - since 1973BMX/SkateABS Hard ShellXS/SM 20 to 21.25` (51 to 54 cm) Matte Grey11AdjustableUPC/EAN/GTIN: 604352891295