Filtrete 16"x 25" x 4" Slim Fit Allergen, Bacteria & Virus Furnace Filter is designed to provide high-performance filtration for a cleaner and healthier indoor environment. This advanced furnace filter captures and removes a wide range of airborne allergens and particles, helping to improve the air quality in your home. It effectively attracts and traps up to 97% of large airborne allergens such as pollen, mold spores, and dust mite debris, reducing the presence of potential irritants that can cause respiratory discomfort. Beyond large allergens, this filter also captures microscopic particles including dust, smoke, and smog, thanks to its electrostatically charged construction. The deep pleat design increases the surface area for filtration, allowing the filter to maintain its effectiveness for up to 12 months with proper . This ensures your living environment stays fresh and healthy over time. Model Number: NDP01-4S-4