Masque Biologique Capillaire is a powerful repairing and fortifying treatment for hair in need of some Tender Loving Care. It injects strength and vitality into dry and weakened capillary fibers. Left on for a few minutes or overnight, it nourishes and strengthens the hair deep down leaving it shining with health and better able to withstand environmental stressors. Recommended for dry Hair Instants©, those that are lacking in vitality, or damaged and/or dyed.