bamett 3-in-1 Car Air Purifier Replacement Filter with Hepa Active Carbon Filter (white) The Primary FilterThe non-woven material, can remove dander,hair,dust and other larger particles. Activated Carbon FilterRemoves Chemicals, VOC's, odors, cigarette smoke, formaldehyde benzene,ozone and other harmful gases. True HEPA filterRemove standard dust cigarette smoke bacteria (bacteria Size: 500 to 0.3 microns) coal ash pollen radioactive particulate Impurity Ion.