Kérastase Elixir Ultime Le Masque, 200 ml, Hair Masks for Women, The Kérastase Elixir Ultime Le Masque 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 regenerates the hair along its entire length hair is soft to the touch strengthens the hair fibre How to use: Leave to act as instructed on the packaging, then rinse thoroughly.