NaturalAire Pre-Pleat 62R Air Filter, MERV 11, 10 x 10 x 1-Inch, 12-Pack Pack of 12 high performance bi-component synthetic media air filters to help eliminate dust and contaminants MERV 11 rating: removes household dust, pollen, dander, lint, smoke, smog, spores and certain bacteria Deep V-pleats provide large media surface area for more effective filtration while keeping airflow resistance low 1-sided expanded metal backing for corrosion protection plus moisture resistant frame Compatible with HVAC systems requiring filters sized 10" x 10" x 1"