Kerastase Nutritive Nectar Thermique Plant Based Proteins + Niacinamide 150ml Kérastase Nutritive Nectar Thermique Leave-In Heat Protecting Hair Treatment – 150ml Luxury salon-quality leave-in blow-dry milk specially formulated for dry, medium to thick hair. This nourishing thermo-protective treatment helps protect against heat styling damage while reducing frizz, improving softness, and leaving hair smoother and shinier.