L'Oreal Professionnel Metal Detox Mask Protect the fiber from particle deposits after any color, balayage or lightening service. Reduce breakage & sensitization caused by metal in fibre. Ensure color uniformity, vibrancy, retention. Prevent new metal particles from coming back. Patented technology with molecule small enough to penetrate and neutralize metal INSIDE the fiber. Key Benefits Intact color vibrancy with intense shine Healthy looking hair: elasticity, resistance, impermeability Metal neutralizer 87% less breakage risk 100% reliable color result Color is homogeneous, lasts longer and is intensely shiny. Directions Use with Metal Detox Shampoo & Protector for best result Use weekly Apply to clean damp hair Leave in for 1-2 minutes Rinse thoroughly