Kerastase Blond Absolu Overnight Recovery Serum Cicanuit is designed to refresh and replenish blonde hair overnight. The lightweight creamy consistency of this leave-in serum provides profound overnight hydration to bleached blond hair while restoring fiber for healthier, softer hair very next day. This formula, infused with Hyaluronic Acid, hydrates hair overnight for intense recovery in the morning: hair feels softer and is protected from split ends and breakage.