Kérastase Resistance Masque Extentioniste is a nourishing mask. Its innovative formula, enriched with Creatine R and Maleic Acid, works at the very core of the hair fiber, reinforcing and sealing hair cuticles to reduce breakage and promote strength. Each strand is revitalized, gaining elasticity and a smooth, shiny finish. Ideal for weakened hair prone to splitting, this luxurious mask nurtures your hair from root to tip, accelerating growth and restoring natural resilience. With Kérastase Resistance Masque Extentioniste, experience the transformation into a mane that's not only longer but visibly healthier and more robust. This is a unisex product, comes in creams form, 16.9 oz. To use apply onto damp hair. Leave on for 10 minutes and rinse. Ingredients include Niacinimide, Glycerin, Lactic Acid, and Hydrolyzed Soy Protein.