Filtrete 20" x 25" x 4" Slim Fit Allergen, Bacteria & Virus Furnace Filter by 3M is designed to provide superior filtration for a cleaner and healthier indoor environment. This advanced furnace filter effectively captures and removes a wide range of airborne allergens, including pollen, mold spores, and dust mite debris, helping to reduce respiratory discomfort caused by common irritants. Its electrostatically charged construction enhances the capture of microscopic particles such as dust, smoke, and smog, ensuring fresher and cleaner air throughout your home. The deep pleat design increases the surface area for filtration, allowing the filter to maintain its performance for up to 12 months. Regular is to sustain optimal air quality and a healthy living space. Model Number: NDP03-4S-4