L’Oréal Professionnel Serie Expert Metal DX, 250 ml, Hair Masks for Women, The L’Oréal Professionnel Serie Expert Metal DX 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: hair is soft to the touch strengthens the hair fibre restores hair’s natural, healthy appearance extends the life of hair dye How to use: Wash with shampoo, then apply to damp hair. Leave to act as instructed on the packaging, then rinse thoroughly.