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Introducing the Shu Uemura Colour Lustre Colour Protecting Hair Mask, a rich, deeply-nourishing treatment that maintains the vibrancy of your salon treatment. Infused with hydrating sake kasu extract, alongside niacinamide, the mask promotes visible smoothness and shine, while preserving up to 96%* of your colour. The multi-purpose formula also helps to provide up to 98% less breakage**. *Instrumental test after 12 washes of shampoo, mask and spray. **Instrumental test vs non conditioning shampoo.