A "face helmet" refers to a type of protective headgear that covers the entire face, including the eyes, nose, and mouth. It is worn to shield the face from potential injuries or harm. Full definition
Full face helmets cover the entire head and face, and are usually the safest option. (findlaylaw.ca)
Half shell and open face helmets provide less protection overall, but are good for casual riders who like to feel the breeze on their face. (findlaylaw.ca)