The Kerastase Blond Absolu Overnight Recovery Cicanuit Hair Serum is specifically formulated to restore and deeply nourish blonde, lightened, or gray hair while you sleep. This intensive overnight treatment works to deeply hydrate and strengthen the hair fiber, reducing damage and mitigating the effects of daily aggressors. Wake up to smoother, softer, and more manageable hair with enhanced shine and reduced brassiness. Apply to dry or damp hair before bed for targeted nighttime repair, ensuring your blonde remains vibrant and healthy.