The Eco-Efficient Reverse Osmosis Membrane filter works by pushing water through a semi-permeable membrane, thereby separating water molecules from contaminants in tap water. The powerful E2RO Membrane significantly reduces pollutants such as heavy metals, cysts, fluoride, arsenic, industrial chemicals, and more. With its unique flow structure, the E2RO Membrane also utilizes less feed water and is more efficient than traditional RO filters.