respirator

noun2

1. •
   A device to assist breathing.
2. •
   A face mask with an integrated filter or filters to keep out harmful dusts, fumes, and mists.

   • Any N95 respirator is designed to filter out 95 percent of particles 0.3 microns or larger.
   • The painters in the paint booth were wearing the kind of respirators with dual filter canisters.