Our NaturalAire Standard Pleated HVAC Furnace/Air Filter, MERV 8, 12" x 12" x 1", 12-Pack, captures dust, pollen, and more, leaving indoor air clean and free of up to 75% of unwanted particulates and allergens and is 6 times more effective than traditional fiberglass air filters at capturing dust, pollen, and other particles from your indoor air. The MERV (Minimum Efficiency Reporting Value) 8 rating means it is third-party certified to effectively reduce common indoor air pollutants such as household dust, pollen, dander, mold spores, and lint. MERV ratings provide a standard comparison of air filter performance, with a higher MERV rating signifying greater efficiency and increased protection against airborne particles. The clay-coated filter frame and wire backing provide durability throughout the filter's life, and its robust construction makes the filter easy to install. The NaturalAire Standard air filter maintains the minimum listed efficiency through the 90-day life of the filter and is UL Classified.