The Simply Conserve Advanced Cartridge Replacement Filter delivers powerful indoor air quality designed to help make everyday wellness more affordable and sustainable. Compatible with the Advanced Cartridge, this composite filter combines a True HEPA H13 filter to capture microscopic contaminants down to 0.3 microns and a Super Absorbent Carbon filter. Using this high quality composite filter inside our patent pending Advanced Cartridge significantly reduces replacement filter cost and landfill waste.