Kérastase Bain Nutri-Thermique thermo-reactive shampoo to provide intense nourishment for dry and sensitised hair leaving it looking shinier, softer and easier to untangle. Bain Nutri-Thermique provides deep nutrition through an exclusive complex of nourishing agents which operate in the most sensitised areas of the fibre, offering intense nutrition to the hair. Heat activates the thermo-reactive formula, trapping the nourishing elements deep inside the hair fibre. The heat-activated formula creates a protective film all around the fibre to help prevent dryness.