Visit the Store Visit the Store Visit the Store Visit the Store PROFESSIONAL HAIRDRESSERS: Kérastase is a leading global luxury professional haircare brand. Born in Paris in 1964, the brand has built its reputation on delivering exceptional performance on scalp and hair through exquisite products and personalized, in-salon treatments, all powered by scientific expertise. Kérastase adopts a care-first philosophy to care for all hair types and all individuals, as well as the world we live in. Rebuild weak and damaged hair lengths while restoring the hair fiber. Resistance strengthens the hair to help repair the effects of heat styling and prevent hair breakage in over-processed hair Expert Formulas Fusio-Dose Instant Transformation, Infinite Possibilities. In-Salon Service Make an appointment in your Kérastase salon for a personalized hair diagnosis. What is the difference between Resistance Force Architecte, Extensioniste, and Therapiste? The main difference between these ranges is the level and type of hair damage. Resistance Extentioniste is ideal for slow growing, damaged hair lengths What is the key ingredient in the Resistance Extentioniste range? The key ingredient is Creatine R, an exclusive complex composed of Creatine an amino acid that reinforces the internal structure of the hair fiber. Is this product safe for color-treated hair? Yes, this product is safe for color-treated hair Extentioniste Shampoo Extentioniste Conditioner Extentioniste Mask Extentioniste Thermique Extentioniste Serum