The HEPA 13 Activated Carbon Filter is designed perfectly to work with the Cyclone O2 air purifier. This filter works in removing 99.99% microns in the air, leaving the space around you smelling clean and fresh.HEPA 13 FilterA HEPA 13 filter captures small microns in the air cleaning 99.99%. This cleans smoke, dust, and pet dander.Activated Carbon FilterThis high efficiency cleans odors in the air such as smoke, wildfires, and cooking smells, leaving the air around you smelling fresh and clean.360 Degree Cylindrical FilterUsing a 360 Degree filter, this allows for the O2 to capture particles from every direction and push out surrounded air flow to clean all around.Convenient Filter ReplacementThe filter needs no expert installation. The O2 device will flash a red light, indicating you need a new filter replacement. Touch the power button for 10 seconds and you can begin the process for a filter replacement.Purchase with Confidence100% satisfaction guaranteed to clean the air. Remove all packaging from the filter before carefully installing.