This is the worst treatment I ever gotten. Do t waste your money on this treatment, within a week my hair was already breaking. I used sulphate and sodium free shampoo which I used for previous treatment in other salons and it worked perfectly fine however this treatment messed with my hair, even the texture it’s differently. The hairdresser doesn’t put any effort on straightening your hair properly or I don’t know if the product is bad but don’t waste your money on this treatment.