Introducing the Shu Uemura Colour Lustre Colour Protecting Hair Mask, a rich, deeply-nourishing treatment that maintains the vibrancy of your salon treatment. n 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**. n *Instrumental test after 12 washes of shampoo, mask and spray. n **Instrumental test vs non conditioning shampoo.