For those with damaged, porous, weak & brittle hair, the Kérastase Resistance Masque Extentioniste offers a nourishing remedy with its deeply conditioning & strand strengthening benefits designed to cure seasonal, environmental, chemical & heat damaged hair. For hair that feels unconditioned & frazzled, this richly textured formula is enriched with Kérastase’s exclusive Creatine R complex, a blend of Ceramide & Creatine that encourages the hair’s cuticle to stay flat whilst improving elasticity & the ability for hair to retain moisture. Particularly beneficial to brittle hair, the complex is incredibly nourishing, helping to eliminate frizz & stop moisture escaping through the cuticle. Further infused with Acid Maleic, the mask seals the flattened cuticle with a coating that provides consistency from root to tip. This encourages natural shine & a healthier appearance to the hair. Improving the flexibility & strength of the hair, it also provides an intense condition so that hair feels lightweight & more manageable. Apply to freshly washed & towel-dried hair using a hazelnut-sized quantity, running it through the lengths & ends. Leave on for 5 minutes before rinsing out.