A motorcycle helmet is a protective headgear worn by riders. It typically consists of a hard outer shell, an inner foam layer for impact absorption, and a comfort liner. The helmet's design aims to safeguard the head from injuries during accidents by absorbing and dispersing impact energy. It often includes a chin strap for secure fastening and a visor to shield the eyes from wind, debris, and sunlight. Helmets come in various styles, such as full-face, open-face, and modular, catering to different preferences and safety needs.