COCONUT SHELL ACTIVATED CARBON: Derived from coconut shells. Absorbs nasties like mercury, heavy metals & pesticides.Helps to improve taste. Found in: Alkaline pack & Clean pack ION EXCHANGE RESIN: Built to soften water. Reduces hardness & limescale. Found in: Alkaline pack & Clean pack ELECTROLYTES: Most filters remove some healthy minerals while taking out the bad stuff. Our Alkaline Pack adds magnesium and sodium for better hydration. Found in: Alkaline pack