The NIOXIN System 4 Hair System Kit contains:1 x NIOXIN System 4 Cleanser Shampoo Step 1, 150 ml1 x NIOXIN System 4 Scalp Therapy Revitalising Conditioner Step 2, 150 ml1 x NIOXIN System 4 Scalp & Hair Treatment Step 3, 40 mlSystem 4 is designed to remove sebum, fatty acids and environmental deposits, regulate hair moisture balance and protect color.professional care treatment for thickening colored, visibly thinning hair.for denser looking hair and restored moisture balancefrees the scalp and hair from sebum, fatty acids and environmental depositshelps improve hair resistance and regulate moisture balancefor a refreshed scalpApplication:Cleanser Shampoo Step 1: Gently massage the shampoo into the hair and scalp. Rinse thoroughly.Therapy Revitalising Conditioner Step 2: Apply the conditioner to the scalp and hair. Leave on for 1 to 3 minutes. RinseScalp & Hair Treatment Step 3: Shake well before use. Gently and evenly distribute over the entire scalp. Do not rinse!