Kérastase Fusio-Dose Booster Densifique Highly Concentrated Replenishing Treatment is a new treatment for those with thinning hair. The Densifique Concentrate instantly offers more dense, more texturised hair thanks to its intense densifying effect, and the Densifique Booster takes action to revitalize the hair. Hair is left looking thicker, fuller and full of volume. Lightweight texture will not overload hair. Fibers are reinforced to leave hair stronger and able to grow. Best for use with Kérastase Elixir Ultime Shampoo and Kérastase Fusio-Dose Concentre Densifique Intensive Bodifying Treatmen