ZENITH Original High Capacity Air Filter Element For Toyota Innova, Fortuner Diesel Passenger Vehicle (FSAFPU843), A particulate air filter is a device composed of fibrous, or porous materials that remove solid particulates such as dust, pollen, mold, and bacteria from the air. Filters containing an adsorbent or catalyst such as charcoal may also remove odors and gaseous pollutants such as volatile organic compounds or ozone.