Premiere Concentre Decalcifiant Ultra-ReparateurWater is good for you. But not so great for your hair. The calcium in your shower water can lead to persistent hair damage leaving it rigid, dull & brittle. This powerful system removes calcium build up that causes damage and restores up to 99% of hairs original strength. It repairs persistent damage, reversing stiffness and dullness for 73% shinier hair, and 2x smoother hair. Hair is 93% stronger.