AIRx ALLERGY 14x14x1 MERV 11 Pleated Air Filter - Made in the USA - Box of 6 MERV 11 furnace filter premium pleated filter, actual size 13.5" x 13.5" x .75" Traps mold, pet dander, smoke particles, pollen and dust mite debris for allergen protection More pleats than most retail air filters - better energy efficiency and captures more particles Made in USA Compare to 3m Filtrete micro particle MPR800 and Filtrete allergen MPR1200 filters