Cabin air filter is made of high density of granular activated carbon, high quality filter cotton layer and non-woven. Three layers of filter. More thick than ordinary filter with carbon and non-woven using . Use synthetic fiber, sandwich structure the filter paper can filter out 0.3micron particles completely, such as: pollen, dust and so on. Even particles, smaller than 0.1 micron, such as bacteria, soot, also can be filtered out 80%. Via electrostatic interaction, the normal work temperature for the cabin air filter is -40 degrees to 85 degrees One more layer of activated carbon to absorb toxic gases, such as ozone, nitrogen oxides, sulfur and hydrocarbons. Each be packed in one box then put in carton