TRESemmé Keratin Smooth, 400 ml, Hair Conditioners for Women, The TRESemmé Keratin Smooth conditioner makes your hair easy to detangle and nourishes it, something all healthy, beautiful hair needs. Characteristics: smooths and acts against frizz makes untangling and styling easier seals the hair’s surface, making it more resilient How to use: Apply after first washing with shampoo. Leave to act for a while, then rinse thoroughly.