Breathe in cleaner air with this Blueair Classic 500 and 600 Series DualProtection filter. The HEPASilent technology eliminates pet dander, mold spores and other various pollutants quickly, while the DualProtection filters remove chemicals such as traffic exhaust, smog and smoke. This Blueair Classic 500 and 600 Series DualProtection filter uses coconut carbon, getting rid of pollutants without the use of chemical additives.