TRESemmé Biotin + Repair 7, 440 ml, Hair Masks for Women, The TRESemmé Biotin + Repair 7 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 structure 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.