Kérastase Nutritive Masque Magistral is a deeply nourishing hair mask designed to restore and revitalize dry, severely weakened hair. Its rich formula works to replenish lost nutrients, leaving hair soft, smooth, and manageable. This intensive treatment is ideal for those seeking to transform their hair from dry and brittle to healthy and radiant. Apply to shampooed and towel-dried hair, focusing on mid-lengths and ends. Leave on for 5-10 minutes, then rinse thoroughly. Experience a significant improvement in hair texture and resilience with regular use.