Postquam styling products. Keratin repair shampoo. Shampoo with great cleaning power that slides dirt from the hair and prepares it for the subsequent straightening treatment. Keratin hydrolyzate repairs the hair fiber, leaving it smooth and even for smooth and shiny hair. Dose on the hands and spread evenly on wet hair, massage repeatedly throughout the head and rinse with plenty of water. You can repeat the process for a deeper cleaning. It is not advisable to use conditioner.