The Nioxin Scalp Treatment 5 for Medium Thick Natural Coloured Hair is an ingenious treatment designed to give you full bodied hair. This treatment helps to clean your hair from root to tip, cleansing your hair & scalp & leaving both refreshed. Formulated with hard working antioxidants & botanicals to refresh the scalp environment this Nioxin Scalp Treatment 5 for Medium Thick Natural Coloured Hair is the third step in this advanced system to restore thickness to hair. Directions of use: Apply directly to entire scalp. Gently massage into scalp. Do not rinse.