Levoit Desktop True HEPA Air Purifier Replacement Filter; Tired of pesky pet hair and dander invading your space? Refresh the air of your home with LEVOIT Desktop True HEPA Air Purifier Replacement Filter. This replacement filter offers three-in-one filtration—an H13 true HEPA filter, a fine preliminary filter, and an activated carbon filter—which are all adept at capturing many sizes of allergens, pet hair, pet dander, pollen, lint, and dust particles while filtering through 99.9% of airborne particles 0.3 microns in size—leaving you with fresher, cleaner air. The latter filters capture larger contaminants, which preserves the lifespan of the HEPA filter. The activated carbon filter is adept at capturing and neutralizing unwanted cooking, pet, and smoke odors for fresher, cleaner air. The filters should be replaced every six to eight months. They can also infuse the air with your favorite pet-safe essential oils for fresher, cleaner spaces.