Filtrete 20-in W x 25-in L x 1-in MERV 11 1085 MPR Allergen Defense Extra Electrostatic Pleated Air Filter (2-Pack) in the Air Filters department at Lowes.com
3M Filtrete 16 in. x 20 in. x 1 in. Ultra Allergen Healthy Living 1550 MPR Furnace Filter - 1 Each - Hvac Controls - Amazon.com
Filtrete by 3M, 20x20x1, Elite Allergen Reduction HVAC Furnace Air Filter, 2200 MPR, 1 Filter - Walmart.com
Filtrete 25-in W x 25-in L x 1-in MERV 13 1900 MPR Premium Allergen, Bacteria and Virus Electrostatic Pleated Air Filter in the Air Filters department at Lowes.com