L'Oréal Professionnel Metal Detox Treatment Mask, for softness, shine & silkiness, longer-lasting color, with a rich & creamy texture, sulfate-free, for colored and damaged hair. Wash after wash, metal particles present in water, such as copper, can penetrate the hair fibers. This can attack the integrity of the fiber and promote color changes. In high concentrations, it can create a risk of breakage and unwanted reflections may appear. To prevent damage and maintain color quality, metal particles can be neutralized. Benefits: The first anti-deposit protective mask to protect hair from metal particle deposits. Patented technology, enriched with Glucoamine, the molecule that tracks and neutralizes metal within the hair fiber. Deeply nourishing formula for less porous hair. -87% hair breakage. Longer-lasting color, 2X shinier. Fiber becomes stronger, more resistant to breakage. Hair becomes softer, nourished for 72 hours.