Kleenex Advanced Allergen Air Filters Merv 11 (4-Pack) help keep your home air clean by capturing hard to see microparticles including lint, household dust, dust mite debris, smog, and pollen. You can't control the air outside, but we make it easy to clean the air you breathe inside. Our MERV 11 rated air filter media is electrostatically charged to trap the smallest particles. Trap the bad, breathe the good. Protect your home and family.