Tea Tree Oil with its natural antiseptic properties and natural herbal extracts, Arnica, Rosemary, and Sage, gently and completely remove build-up from hair and adds moisture to nourish, calm, and soothe dry flaking scalp. A pH of 5.5 matches the acid mantle of the scalp and allows the naturally derived cleansers to work at their best. Continued use will leave hair and scalp in natural condition.