Kerastase Nutritive 8HR Magic Night Serum is an intensive nourishing overnight serum which conditions your hair while you sleep for long lasting nourishment. The non-greasy formula, containing iris root extract and blend of 5 essential vitamins, leaves hair feeling lightweight and luxuriously nourished in the morning with no need to rinse out. With its beautiful fragrance designed to develop whilst you sleep, this is the perfect addition to your night time beauty regime.