The Nioxin System 2 treatment helps to support fuller, thicker hair whilst simultaneously protecting it against damage. Breakage is reduced and hair's resilience is increased. System 2 is suitable for Natural Hair with Progressed thinning. Step 2 in the full System 2 treatment, the Color Safe Scalp Therapy Revitalizing Conditioner nourishes the hair and optimises it for further treatment. To use: Apply to the scalp and work to the ends. Leave for 1 to 3 minutes before rinsing.