Kérastase Blond Absolu neutralizes brassiness with this ultra-violet shampoo. Infused with hyaluronic acid and edelweiss flower, the formula gently cleanses while replenishing hydration. It protects lightened, cool blonde, or grey hair from pollution and environmental stressors. Regular use of this purple shampoo ensures that cool blonde tones stay vibrant longer. The hair is left silky-soft, luminous, and refreshed.