Filtrete furnace filters by 3M are a great way to protect yourself and your family against airborne allergens. Boasting an MPR of 1000, these electrostatic filters will help ensure you get to live in an environment where the air is as clean as possible. These pleated allergen reduction filters attach to your cooling or heating system to capture airborne microparticles such as dust, lint, pollen, smoke, smog, mould spores, and pet dander. They're manufactured without antimicrobial agents, and yet, under normal circumstances, they won't support the growth of bacteria, fungi, mildew, or mould. For best results, make sure to change your filter seasonally (every 90 days). Recognized by the American Lung Association. Size: 16 in. x 24 in. x 1 in.