Scalp and Hair Leave-In Treatment System 1 For Fine Hair With Light Thinning - Nioxin Scalp and Hair Leave-In Treatment System 1 For Fine Hair With Light Thinning is a professional volumizing scalp and hair leave-in treatment for natural hair with light thinning. Benefits Professional volumizing scalp and hair leave-in treatment for natural hair with light thinning. Transactive Delivery System 2.0 technology provides thicker-looking hair by increasing the fullness of each hair strand. Moisturizes hair and scalp for thicker, fuller hair. Increases hair resilience plus moisture balance. Shake well. Apply evenly to entire scalp. Do not rinse. Nioxin's diameter-increasing Scalp Treatment is the final step of the three part System, which amplifies hair texture while protecting against breakage. - Scalp and Hair Leave-In Treatment System 1 For Fine Hair With Light Thinning