respirator
Mask that filters out contaminated air; it covers the entire facial area to protect the nose, mouth and eyes.
facepiece 
Part of the mask that adheres to the face and prevents ambient air from entering.
head harness 
Straps that attach at the back of the head to secure the mask to the face.
filter cover 
Device that protects the cartridge filter.
exhalation valve 
Device that allows air to be expelled from the mask.
inhalation valve 
Device that allows air to enter the mask and prevents exhaled air from exiting through the air intake.
cartridge 
Device that filters out contaminated air by absorbing harmful substances.
visor 
Transparent part of the mask that allows the user to see.