Levoit Personal HEPA Air Purifier Replacement Filter; Tired of pesky pet hair and dander invading your space? Refresh the air of your home with LEVOIT Personal HEPA Air Purifier Replacement Filter. This replacement filter offers three-in-one filtration—an H12 personal HEPA filter, a prefilter, and an activated carbon filter—which are all adept at capturing allergens, pet hair, pet dander, pollen, smoke, odors, and dust particles while filtering through 99.9% of airborne particles 0.3 microns in size—leaving you with fresher, cleaner air. The sturdy materials let this replacement filter last longer, but the prefilter should be replaced every two to three months, while the HEPA and activated carbon filters should be replaced every six to eight months. These replacement filters can help reduce odors as well, so you and your furry friends can enjoy fresh, fine scented air.