If you have to cover your dome, and let's face it, you should, then the 9MM by HIGHWAY 21 is a great way to do just that. Classic helmet design combined with premium material for a helmet that will protect your head, neck, and keep Johnny Law at bay. DOT approved. Meets the FMVSS 218 Standard. Durable lightweight ABS shell. EPS (Expanded polystyrene) interior. Diamond stitched Coolmax liner. Washable and replaceable interior. Dual D-ring chinstrap. Protective helmet bag