Filtrete 16x25x1 MPR 1200 Air Filter, made by 3M, helps minimize strong odors and capture unwanted particles and allergens from your household air to contribute to a cleaner, fresher home environment. Designed with exclusive Filtrete 3-in-1 technology with a unique active carbon layer that captures odor particles, plus an MPR 1200 and MERV 11 rating, your AC filter will help pull and capture countless microparticles – such as pet dander, smoke, smog, odors, and cough and sneeze debris – while letting cleaner air flow through. Your Filtrete Filter will also capture large particles, including lint, pollen, mold spores and household dust. Use a 3-month pleated 1-inch home HVAC filter in your furnace, air conditioner or HVAC system. Six come in a pack, so keep a few filters as backup, or use them in multiple areas. For optimal performance of your heating and cooling system or HVAC system, change your furnace filter at least every 90 days. (1) Based on the 2022 Ipsos US Brand Health Study of Residential HVAC Air Filters.