Product Description Refresh the scalp and increase hair volume with NioxinAs 3-part System 3 Scalp & Hair Treatment for colored Hair with Light Thinning This diameter-increasing professional product refreshes the scalp and gives a healthy shine to your hair With its Transactive Delivery System 20, the volumizing Nioxin leave-on treatment helps provide thicker hair by increasing the fullness of each hair strand Nioxin Scalp & Hair Treatment is the final step of the 3-part System, which amplifies hair texture while protecting against breakage Nioxin Nioxin is the only salon brand with 25+ years of experience in thinning hair Nioxin, supported by The Institute of Trichologists, believes the scalp is an extension of facial skin and requires the same attention and care