With 4.7 stars from other Sephora shoppers, this Kérastase Reflection Mask for Colour-Treated Hair ($56) is solidly praised for the work it does conditioning, protecting, and maintaining strong, colour-treated hair. Brittleness is targeted with rice bran oil, and fruits like yuzu and lychee neutralise damageing minerals in water, so hair doesn't turn dull and fragile after it's coloured.