The Kerastase Blond Absolu Masque Ultra-Violet is a perfecting anti-yellowing hair mask designed to neutralize unwanted brassy tones in blonde hair. It provides deep hydration and care, leaving hair feeling soft, shiny, and revitalized. Formulated with powerful neutralizing agents, this mask helps to maintain cool blonde shades while nourishing the hair fiber from within. It is ideal for regular use to keep blonde hair looking vibrant and bright.