Kerastase Chronologiste Thermique Regenerant helps promote healthier-looking hair that is more manageable. Protect and refine hair with a leave-in designed to smooth, nourish, and enhance manageability. This lightweight formula helps improve the look of hair texture while providing heat protection up to 450°F. Ideal for blow-drying and heat styling, it helps control frizz and smooths the hair cuticle for a polished, sleek finish. Hair appears more refined, soft, and radiant.