KERASTASE FUSIO DOSE CONCENTRE [H.A] ULTRA-VIOLET Anti-Brass Restoring Purple Care for Lightened, Highlighted or Natural Blond Hair Size: 10x12ml / 10x0.4fl.oz.ml Kerastase Fusio-Dose Concentre [H.A] Ultra-Violet is a part of Fusio Dose family of professional hair treatments with unique formulas containing highly concentrated active ingredients designed to resolve all your hair concerns. Kerastase Fusio-Dose Concentre [H.A] Ultra-Violet is meant to reveal luminous colder, shinier blond and instantly neutralize brassy and yellow undertones as the main concern and it must be combined with the booster of your choice to address a secondary hair concern. The beauty of the Fusio-Dose is that you can create a tailor-made solution based on your hair needs and combine different hair treatments into ONE by mixing the concentrate with different types of boosters to address your hair needs. The freshly fused treatment with initial dose of goodness will fundamentally treat your hair and immediately transform it for lasting results. For all types of blond hair Restores sensitized fiber post bleaching or lightening Replenishes surface damage for softer and stronger touch Provides immediate anti-brass action Can be used as toner after bleaching or as a tool to maintain blond color fresh and radiant Must be combined with one of the boosters to address secondary hair need Need one Booster to fill 10 Concentre Vials Cruelty-free/No Animal Testing