L’Oréal Professionnel Serie Expert Power Mix, 10 ml, Hair Masks for Women, The L’Oréal Professionnel Serie Expert Power Mix 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: regenerates the hair along its entire length restores hair’s natural, healthy appearance How to use: Wash with shampoo, then apply to damp hair. Leave to act as instructed on the packaging, then rinse thoroughly.