Helmet

A helmet is a form of protective gear worn to protect the head. More specifically, a helmet complements the skull in protecting the human brain. Ceremonial or symbolic helmets (e.g., a policeman's helmet in the United Kingdom) without protective function are sometimes worn. Soldiers wear combat helmets, often made from Kevlar or other lightweight synthetic fibers.

Various helmets for numerous activities, with different head-protection goals. A martial-arts helmet protects from kicks and punches to the face. A hard hat protects from objects dropped on it. Bicycle, ski, and motorcycle helmets protect the head from impacts on hard surfaces.
French cyclist Jérémy Leveau wearing a bicycle helmet

The word helmet is derived from helm, an Old English word for a protective head covering.[1]

Helmets are used for recreational activities and sports (e.g., jockeys in horse racing, American football, ice hockey, cricket, baseball, camogie, hurling and rock climbing); dangerous work activities such as construction, mining, riot police, military aviation, and in transportation (e.g. motorcycle helmets and bicycle helmets). Since the 1990s, most helmets are made from resin or plastic, which may be reinforced with fibers such as aramids.