Maximize the performance of your air purifier with this replacement air filter. HEPA-Type filtration captures up to 99 percent of airborne pollutants such as dust, pet hair/dander, pollen, smoke and odors as small as 2 microns. Dual Action Filter features a specially formulated carbon pre-filter that traps household odors to reduce unpleasant scents. Air filter is wrapped in a protective layer to ensure purity. Replacement filter is designed for use with Febreze air purifiers (sold separately).