Phytorelax Laboratories Keratin Color, 150 ml, Hair Masks for Women, The Phytorelax Laboratories Keratin 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: extends the life of hair dye regenerates the hair along its entire length gives hair a brilliant shine hair is soft to the touch How to use: Wash with shampoo, then apply to damp hair.