respirator
For tagging purposes, a respirator is a mask device that covers the nose and mouth to protect the wearer from inhaling harmful dust, fumes, vapors, or gases. These types of masks can be disposable (ex: post #3893130), made of material that filters out fine particles, or reusable (ex: post #1146908), utilizing replaceable filters.
If the mask also covers the eyes then do not use the respirator tag and instead use the gas mask tag.