The Filtrete Ultra Allergen 2X Bacteria & Virus Filter is a high-quality air filter designed to improve indoor air quality by capturing bacteria and viruses. With a 1600 MPR rating, this filter effectively traps airborne particles to provide cleaner and healthier air for your home. The filter comes in a convenient 4-pack size of 24x12x1 inches and is in a sleek white color. Ideal for use in heating, cooling, and air systems, this filter from Filtrete is an essential component for maintaining a clean and healthy environment in your living space.