The **full-face helmet** is a passive safety element that protects the head and face in the event of an accident. This type of helmet covers not only the top of the head but also the face and jaw, which is crucial to prevent serious injuries.

- **Abrasion protection**: In the event of a fall, the full-face helmet helps prevent the face and head from being scraped along the ground. This is especially important to protect the skin from **abrasion against the asphalt**, which can cause burns and severe injuries.

- **Impact distribution**: The helmet is designed to distribute the force of the impact across its entire surface, preventing it from being concentrated at a single point on the head. This reduces the risk of serious injuries.

- **Additional protection**: In addition to protecting against abrasion, the full-face helmet also protects against direct blows and prevents sharp objects from coming into contact with the head.

In summary, the full-face helmet is essential for protecting the face from abrasion in accidents, as well as offering complete protection for the head.