Filtrete Healthy Living Filter, 12-Inch by 20-Inch by 1-Inch, 1-Pack 90% effective at capturing particles like dust mite debris, pollen and mold spores from the air passing through the filter 50% better small particle filtration than our Allergen Defense Filter Outperforms fiberglass, washable and non-electrostatic pleated 1" filters Lasts up to 3 months For residential use only