Nourish and renew your hair whilst caring for your scalp with Kerastase Specifique Masque Hydra-Apaisant. The sweet, gel-based formula of Kerastase Nutritive Masque Hydra-Apaisant uses oil and seed extracts to replenish and renew your hair, making it feel like new. Work into your hair and scalp after a shampoo, leaving in for several minutes before rinsing out.