Dust and allergens do n't a chance. Every breath is a to care about your air. Now with the new Filtrete dual-action small Allergen plus 2x dust defense filter, you can all the benefits of Allergen defense plus the best dust holding capacity of any Filtrete filter. improve your indoor air quality by capturing allergens and holding 2x more dust * - because a fresher, cleaner home is a happy home. * to other Filtrete filters.