A respirator.
A full-face diving mask.
The part of the helmet that directly covers the face, made of one or more plastic-coated metal bars.
The foul of grasping it during play.
A dust mask.
A surgical mask.
A mask made of common textiles worn over the mouth and nose, such as a bandana, handkerchief, or scarf.
A facial mask (cosmetic application).
A ventilated compartment in which chemical procedures may be undertaken without the escape of noxious fumes into the local environment.