Kérastase 8H Magic Night Serum Nutritive is a leave-in night serum for hair that enhances the nourishment of all dry hair types. During the night, hair tends to compensate for the loss experienced during the day by absorbing all the nutrients from hair care products. With iris root extract and a blend of five vitamins, including vitamin E, the serum penetrates deeply into the hair fiber over eight hours and is 100% absorbed to restore the hair's moisture level. Its lightweight, creamy texture is suitable for all hair types: it helps detangle fine hair, while providing better manageability for normal or thick hair. By the next morning, hair is nourished, visibly softer, easier to style, and has a light satin finish.