The Nioxin 3-Part System 4 Scalp Therapy Revitalising Conditioner delivers strengthening benefits to coloured hair. Suitable for those who suffer with progressed thinning, the formula seeks to fortify & moisturise your lengths. Bio Amp technology helps to restore hydration while providing hair resilience, thereby resisting snaps & breakage. Incredibly lightweight, the density-protecting conditioner helps to support a fuller-looking mane. It is the second step of a 3-part treatment, designed to reinforce hair structure.