Product Description Nioxins Scalp & Hair Leave-In Treatment System 1 for natural hair with light thinning is the final step of athree part Nioxin regimen, specially formulated to refresh the scalp and increase hair volume. The volumizing Nioxin leave-in treatment helps provide thicker looking hair by increasing the fullness of each hair strand. Features & Benefits Professional leave-in treatment to help increase hair diameter for natural hair with light thinning. Volumizing Leave-on scalp treatment for Natural hair with Light thinning. Contains antioxidants, botanicals, and peppermint oil that helps to provide a refreshed scalp environment. Protects against hair breakage & gives a healthy shine to your hair. Best results achieved when used 3 steps together.