The personal air filter cartridge by Eco Four Twenty last up to 500 exhales before needing to be replaced. The average user will use this for 2-3 months. When the time comes to replace simply pick up one of these replacement cartridges which includes two refill filters. The high quality 2 stage filter features activated Coconut Shell-Carbon Filter + HEPA Filter, which means this filters more than cheap competitors!
Simply Unscrew the Eco Four Twenty Personal Air Purifier and replace the filter. It takes only 3 seconds!