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>