Nioxin 3D System 5 Scalp & Hair Treatment is a treatment that refreshes the scalp and increase hair volume. Thanks to its Transactiv Delivery System 2.0, this professional product refreshes the scalp and gives a healthy shine to your hair. The volumising Nioxin leave-on treatment helps provide thicker-looking hair by increasing the fullness of each hair strand. Nioxin’s Scalp & Hair Treatment is the final step of the 3-part System, which amplifies hair texture while protecting against breakage. System 5 is designed for chemically-treated hair with light thinning.