The Kerastase Blond Absolu Masque Ultraviolet is formulated to neutralize unwanted brassy tones and provide deep nourishment to blonde or lightened hair. This intensive treatment helps maintain the cool tones of your blonde, leaving hair intensely conditioned, soft, and luminous. It offers protection against daily environmental aggressors that can dull or yellow blonde shades. Ideal for frequent use to preserve the vibrancy and integrity of highlighted or naturally light hair.