Chronologiste Overnight Youth Serum hydration 20% more shine** and 2x

20% more shine** and 2x more color protection

Clean and distinctive fragrance

Cloud barely makes a sound while you sleep

volume and humidity resistance for a frizz-free finish

Chronologiste Overnight Youth Serum hydration 20% more shine** and 2xOvernight Youth Serum by Krastase is a powerful age corrective leave in treatment designed to work while you sleep, reversing visible signs of hair aging by morning. Infused with Pro Xylane and Ochrophyta Algae, this advanced overnight serum delivers concentrated actives deep into the hair fiber to restore vitality, strength, and youthfulnesseffortlessly, with just one pump. Why you'll love it: As hair ages, it can lose density, shine, and smoothness.