Kérastase Nutritive Bain Satin 2 Irisome Exceptional Nutrition Shampoo The Kérastase Nutritive Bain Satin 2 Irisome Exceptional Nutrition Shampoo ($22) is the last shampoo you will ever buy! Not only does this shampoo hydrate and eliminate frizz, but it always leaves your hair feeling like you just left the salon.