Protect hair from excess copper coming from water, with L'Oreal Professionnel Serie Expert Metal Detox Mask; this mask protects the fiber from deposits after any colour, balayage or lightening treatment. With a creamy texture, this unique mask helps maintain colour vibrancy, instantly smooths and softens hair resulting in nourished healthy locks. When you get the Metal Detox treatment in salon before colour followed by our care routine, enjoy the benefits of up to 87% less breakage** & reliable colour results. For optimal results, use after Metal Detox anti-metal cleansing cream shampoo. *Instrumental test after Metal Detox Shampoo + Mask up to next shampoo **Instrumental test: Metal Detox pre-treatment + technical procedure + shampoo + mask.