3/4 Helmet
Like the full face motorcycle helmet, the 3/4 motorcycle helmet (also known as open face motorcycle helmet) covers the back of the skull, but rids itself of the lower chin armor and the face shield, thus allowing for increased airflow, hearing and peripheral vision.
Some open face helmets are equipped with visors of various lengths and tints that block out sunlight and headlights. As insects, debris, dust or wind contact with facial skin, eyes and nose can cause the rider distress or bring about injury, riders may use wrap-around sunglasses or goggles as an additional means of protection.
A 3/4 motorcycle helmet is as effective in rear protection as a full face motorcycle helmet, but is deficient in face coverage during a crash or otherwise.