Filtrac CF5491 Premium Anti-Bacterial Cabin Air Filter Filtrac is specially designed filter with three filtration stages to ensure the quality of air inside the car 1st stage electrostatically charged media to eliminate fine dust and pollen 2nd stage is refined activated charcoal that traps bad smells, mold and harmful gases 3rd stage is an advanced anti-bacterial coating Filtrac prevent harmful spores and pollen from entering the vehicle cabin and keep passengers protected