L’Oréal Professionnel Serie Expert Curl Expression, 250 ml, Hair Masks for Women, The L’Oréal Professionnel Serie Expert 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 strengthens the hair fibre enhances natural waves and curls regenerates the hair along its entire length How to use: Leave to act as instructed on the packaging, then rinse thoroughly.