3M Filtrete Dust & Pollen Filter Electrostatically charged fibers grab troublesome particles from the air Keeps on filtering for 3 months so you'll spend less time changing filters Removes Pollen, Mold Spores, Dust Mite Debris, Household Dust, and Lint 3M Microparticle Performance Rating: 600 MERV Rating: 8 Outperforms all competitors' 3-month, 1-inch filters Electrostatically charged fibers grab troublesome particles from the air Meets the American Lung Association's "Health House" Indoor Air Quality Guidelines Cheap 1-month filters protect your heating & cooling system from debris, but they don't remove a single speck of dust from the air. Step up to the Filtrete Dust & Pollen Filter and turn your heating & cooling system into a huge whole house air filter - removing allergens like Pollen, Mold Spores, Dust Mite Debris, Household Dust, and Lint. Like all 3M Filtrete filters, the Dust & Pollen filter lasts for 3 months, and is electrostatically charged, which helps it to attract even the smallest particles without restricting the airflow in your system. It removes allergens like Pollen, Mold Spores, Dust Mite Debris, Household Dust, Lint, Smoke, Pet Dander, and Smog. Like all 3M Filtrete filters, the Micro Allergen filter lasts for 3 months, and is electrostatically charged.