crg full-face motorcycle street bike fiberglass helmet dot certified atv-1 - parent (medium,matte black) crg sports crg helmets are made by advanced fiberglass reinforced plastic outer shell, transparent color pc shield, dot certified. all helmets are brand new come with an original crg packaging box. helmet size chart head size <ul> <li>xs: 53 - 54 cm</li> <li>s: 55 - 56 cm</li> <li>m: 57 - 58 cm</li> <li>l: 59 - 60 cm</li> <li>xl: 61 - 62 cm</li> <li>xxl: 63 - 64 cm</li> <li>3xl: 65 - 66 cm</li> <li>4xl: 67 - 68 cm</li> <li>5xl: 69 - 70 cm</li> </ul>