The Pur-Alkaline filter supplements high-quality drinking water with essential minerals to promote a healthier lifestyle. The human body is 70% water, so why not drink water that provides your body with the minerals it needs? Plus it tastes better. The Pur-Alkaline works in conjunction with a reverse osmosis (RO) drinking water system like the Puronics® Micromax™ Series, to restore to your water the beneficial minerals that were removed during the reverse osmosis water purification process. So, get more out of your water by putting more in with the Pur-Alkaline.