The ultimate sulfate-free, purifying and clarifying shampoo. What it does: Nyrvana Purifying Shampoo removes excess styling and environmental buildup without drying. this shampoo can also be used as a clarifying wash to remove mineral deposits such as chlorine. What else you need to know: Nano Emulsion helps to protect and preserves semi, demi and permanent haircolor. EDTA helps to remove product, minerals and medication from hair, an ideal first step prior to any chemical service.