Improve the air quality in your home with this highly efficient air purifier filter. It uses a 3-stage filtration system consisting of a fine preliminary filter, HEPA H13, and an activated carbon filter to effectively remove even the most microscopic particles from the air.It fits perfectly with the Vremi Premium True HEPA Air Purifier and installs super easily. Simply rotate the filter cover off and replace the old filter with the new. Then, press the “filter” button for 3 seconds and you’re good to go. The filter lasts up to 6 months or 4320 hours.