The Accumulair Diamond pleated air filter is over 30-times more efficient at capturing micro particles than ordinary fiberglass filters. This high performance filter reduces up to 98% of common airborne allergens such as pollen, dust, dust mite debris, lint, small fibers, pet dander, smog, and smoke. Ideal for those who have sever allergy sensitivities or are exposed to an excess of airborne contaminants.