This unique and environmentally friendly process cleanses your water, filtering away 91% of chlorine, heavy metals and harmful VOCs that can fade your hair colour, causing dullness and brassiness. Unlike other filtration devices that rely upon coal to improve water quality, the Resc-Hue Water Purification System uses carbonized coconut shells, a renewable resource sustainably harvested from coconut trees. Makes a beautiful difference in your hair, your skin, your body.