Kérastase Sérum Thérapiste is a hair serum for very damaged and treated hair. It instantly repairs the hair fibers, strengthens the hair and protects it from blow-drying damage and split ends. - Heat protection up to 230°C - Strengthens hair fibers - Strengthens hair fibers and makes them smoother - Makes hair drying twice as fast - Seals split ends - Protects against split ends - Soft and shiny result