Made of fiberglass and basalt, the filter is inorganic, which prevents the growth of bacteria and fungi. Life time about 1000 hours, equivalent to 4-5 hours daily use for 6 months. The service life depends on water quality as well as the amount of dust particles in the room. Easy to change!
NOTE! If you buy a new Evapolar air cooler, evaBREEZE filters are already included.