Kerastase Nutritive Masque Magistral, 16.9 Ounce is a treatment hair mask that deeply nourishes hair from within. It offers deep nutrition and leaves hair intensely nourished and more manageable. Kerastase Nutritive Masque Magistral is a restorative hair mask that works to nourish and soften severely dried-out hair. It will give your dry hair the salon look you are looking for by nourishing and adding protection, shine and softness. Your hair will become more manageable and luxurious.