The Nioxin System 4 treatment clears the hair of follicle blocking sebum, fatty acids and residues. In addition it hydrates the hair whilst improving hair fullness, resilience and protecting hair colour. Nioxin System 4 Kit is a three-step restorative system to bring vitality and volume back to your coloured hair with progressed thinning. BioAmp adds thickness and strength whilst Activ-Renewal gives a more youthful-looking scalp and fuller, healthier looking hair. Transactive Delivery System delivers essential nutrients onto the scalp which improves the appearance of thinning hair and creates an environment for fuller, healthier looking hair. Set includes: System 4 Cleanser Shampoo Step 1 150ml: Gently remove toxins, residue and DHT from the hair and scalp to promote a healthy scalp environment and ultimately encourage hair growth. To use: Apply to wet hair, massage and rinse thoroughly. System 4 Scalp Therapy Revitalizing Conditioner Step 2 150ml: A daily hair and scalp conditioner which hydrates and energises. To use: Apply to the scalp and work to the ends. Leave for 1 to 3 minutes before rinsing. System 4 Scalp and Hair Treatment Step 3 50ml: A daily leave in scalp treatment, this delivers essential botanicals, nutrients, antioxidants and vitamins to the hair and scalp. To use: Apply directly to entire scalp. Gently massage into scalp. Do not rinse.