Febreze AFFB2020 High Allergen Microparticle and Odor Reduction Air Furnace Filter, 20-Inch by 20-Inch - Set of 4 Electrostatic, high allergen microparticle reduction with febreze fresh fragrance control Reduces odors and freshens the air with febreze fresh scent option 3 stage odor reduction technology Captures pollen pet dander dust mites dust lint mold spores microscopic allergens odors smoke smog and volatile organic compounds Provides a hint of freshness throughout your entire home