A thermo-reactive mask for dry, sensitised hair, Kerastase Nutritive Masque Nutri-Thermique provides intense nourishment. From the hair fiber to your ends, hair is left soft, hydrated & conditioned. Kerastase Nutritive Masque Nutri-Thermique delivers an exclusive complex of nourishing agents to fortify & strengthen hair. Heat activates the formula, trapping the nourishing elements deep inside the hair fiber. Heat also activates a protective film over your hair to prevent dryness & damage. Follow your treatment mask by blow-drying or straightening with hair straighteners to activate. Hair is left feeling soft, supple & easy to de-tangle.