Demi-permanent gloss color. Fills gaps from lost melanin and reinjects color inside the fiber. For 6 weeks of gloss color.* [Melanin Gap Filler Technology] Fills gaps from lost melanin and reinjects color inside the fiber. Up to 92% natural origin.** No ammonia. Up to 70% grey coverage. 3x more shine*** 99% true-to-tone natural reflects. Tested, co-created & approved by pros. * Instrumental & consumer tests **Maximum % of naturality across all shades of the range, with at least 84%. *** Instrumental test