3M Filtrete Allergen Defense Air Filter, 20-Inch by 30-Inch by 1-Inch

For people who want to help reduce allergens and microscopic particles from the air in their homes. MPR 1000 captures large airborne allergens like household dust, pollen, and mold spores. Attracts and captures microscopic allergens like pet-dander, smoke and smog particles. Lasts up to 3 months. Only Filtrete filters carry the American Lung Association Health House Logo.