Outperforms all competitive 1, three month filters*;Carries a 1900 Microparticle Performance Rating (MPR);Attracts and captures 93% of large particles like mold spores and, dust and pollen from the air passing through the filter;Attracts and captures microscopic allergens like pet dander, smoke and household dust and microscopic particles that can carry bacteria, viruses and odors;Almost twice the small particle filtration than our 1000 performance level filter

• 3M UA03-4PK Filtrete Ultra Clean Air Purifier, 4-Pack
• 20x25x1

3M UA03-4PK Filtrete Ultra Clean Air Purifier, 4-Pack3M