10 PM2.5 Carbon Face Mask Filter

PM2.5 Carbon Face Mask Filter Replacement for Reusable Face Masks Comes in 1 pack of 10 Improve your face mask's effectiveness by adding an extra layer of protection with this pm2.5 face mask filter. Composed of 5 layers to provide comfort and security: 1st layer of non-woven fabric filters micron-level dust. 2nd layer of filter cloth filters pollen and allergens. 3rd layer of active carbon cloth filters VOCs, odors, industrial pollutants, automobile exhaust, and