This frizz-reducing leave-in hair treatment hydrates and protects the hair fiber from external aggressors. The antioxidant-rich formula smoothes, softens, and provides up to 450-degree heat protection. Hair is 96% smoother* and instantly softer Intense protection against humidity Rich antioxidant properties protect hair from oxidative stress Thermal protection up to 450°F *Vs. Untreated Hair Awarded Marie Claire's Excellence in Beauty Awards 2022 Protects Color Heat Protectant Smooths Softens Hair . | Kérastase - Chroma Thermique Heat Protecting Serum - 150 ml