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3M offers a full line of Filtrete Air Filters that are designed to help make the air in your home cleaner. Filtrete filters' electrostatically charged fibers work like tiny magnets to attract and capture small particles that can aggravate allergies like smoke, pet dander, household dust, smog, bacteria and particles that can carry viruses. The Filtrete Ultra Allergen Reduction Air Filter outperforms all other 1 In., 3 month filters. For the most removal of both microscopic and large airborne particles, no 1 In. filter performs better. In fact, it was named best performing 1 In. filter in a 2007 study conducted by a leading consumer publication.