Kérastase Specifique Masque Hydra-Apaisant, 200 ml, Hair Masks for Women, The Kérastase Specifique Masque Hydra-Apaisant hair mask is an essential step in your hair care ritual. Give it a moment to regenerate and it will repay you with vitality and beauty. Characteristics: moisturises intensely restores hair structure regenerates the hair along its entire length How to use: Wash with shampoo, then apply to damp hair. Leave to act as instructed on the packaging, then rinse thoroughly.