20x25x1 NaturalAire MERV 13 Filters, Case of 12

20x25x1 NaturalAire MERV 13 Filter. The NaturalAire MERV 13 features efficient electrostatic filtration media that helps capture unwanted particles in your home, including: Pollen, Pet Dander, Mold Spores, Bacteria, Microscopic Allergens, Virus Carriers, Smoke, and Smog Particles. It has the highest level of efficiency in a residential filter. This filter removes airborne particles, delivering the air flow you need to create a cleaner, fresher indoor environment. The robust construction makes the filter easier to install and ensures it will last up to 90 days in your home. Reduces up to 95% of large airborne particles.