Filtrete Clean Living Dust Reduction AC Furnace Air Filters, 600 MPR, 16 x 30 x 1-Inches, 6-Pack Captures large airborne allergens like household dust, pollen and mold spores Great for high velocity equipment because it is engineered for high air flow Microparticle Performance Rating MPR 600 equates to Minimum Efficiency Reporting Value MERV 7