Filtrete CL20-4 Air Filter, 12 in L, 24 in W, 7 MERV, 600 MPR

You run a tight ship at home, from floor to ceiling and everywhere in between. Unfortunately, ordinary home non-electrostatic air filters aren't super effective at capturing unwanted particles. Good News: The unique design of the electrostatically charged Filtrete" pollen air filter attracts and traps more particles from your air through your heating and cooling system, making quality control a breeze. With each cycle through the filter, your indoor air becomes a little bit cleaner.