2 Pack, Paint Odor Valve Respirator, Painting & Refinishing Respirator With Odor Relief, Helps Provide Relief From Non-Harmful Dusts, Mists & Annoying Odors, Using Aerosol Paint Spray Cans, Brushing Or Rolling Water Based Latex Paint, Applying/Removing Solvent Based Paint Strippers Or Staining, Varnishing Outdoors.