Schwarzkopf Professional BC Bonacure Fibreforce, 150 ml, Hair Masks for Women, The Schwarzkopf Professional BC Bonacure Fibreforce 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 strengthens the hair fibre gives hair a brilliant shine hair is soft to the touch How to use: Wash with shampoo, then apply to damp hair. Leave to act as instructed on the packaging, then rinse thoroughly.