Air flow in cabin is high which it can reach 100 cubic meter per hour. Definitly we need a reliable cabin air filter to take care of our breathe. Poor quality air makes ou tiredm irritates your eyes and respiratory tract, expecially the ejected air on the road. If the cabin failed to do the filtration work the pollutants will condense 6 times concentration than external. SL CABIN AIR FILTER can ensure improved comfort and fresh air in our car. They will almost completely free the air entering the vehicle of dust, pollen, soot and other pollutants precisely those substances which can causing health issues. We suggest please replace every 10 thousand km or when change the seasons.