The Goldwell kerasilk colour shampoo cleans very gently dyed hair and protects it against premature colour loss. Your hair is wonderfully smooth and shiny with keratin and tamanu oil.the kerasilk colour gentle dry shampoo by Goldwell refreshes your hair and the colour brilliance. In addition, it protects against premature colour fading. The sebum of the scalp is absorbed and brushed together with the dry shampoo.