Protect yourself on your next project with the 3M Reusable N95 All-Purpose Safety Respirator Mask + 2-pack P100 Replacement Carbon Filters. The 3M 65021 Household Multi-Purpose Respirator helps filter out the particles and certain odors you don't want to inhale, while providing comfort with adjustable features. 3M Replacement Cartridges for Household Multi purpose Respirator help filter out the debris and odors you don't want to inhale when staining a deck or spraying certain pesticides.