Kerastase Nutritive Immersion Nutritive Iris Royal Pre-Shampoo Nutrition Replenisher provides moisture and protection to dry and sensitized hair. This specially designed product hydrated and protects hair before it is washed and styled. Nutritive Irisome immersion is a must for dry and delicate hair. This product is best for dry to extremely dry hair. It helps to diminish signs of damage and dryness by adding nutritional power. Hair is restored starting at the cuticle. Best for use before Kerastase Nutritive Bain Satin 2 with Irisome Shampoo.