After a night out, the most indulgent ritual of care begins. ✨ Give your hair the ultimate youth reset before you sleep. Chronologiste Overnight Youth Serum works in harmony with your biology to deeply regenerate, hydrate, and protect the fiber overnight. Wake up to sublime softness and luminous, revitalized hair. #Kerastase #Chronologiste #OvernightSerum #BeautySleep #HairCare