3m 9815dc-6 filtrete micro allergen filters - 6 pack - 12 x 20 x 1 in.

Filter performance rating fpr of 7 pleated filter design with microfiber construction electro statically charged fibers attract and capture microscopic airborne particles including smoke, pet dander, household dust and smog attracts and captures large airborne allergens including pollen, mold spores and dust mites