The onCare Densi-Fill treatment is ideal for fine or damaged hair. A professional treatment with immediate effect, reserved for hair salons. It rebuilds damaged hair and makes it denser thanks to a filler action from the inside. The treatment is reinforced with hyaluronic acid for a deep moisturization. Formulated with marine collagen, this treatment significantly improves fiber regeneration. It leaves hair visibly thicker and full of volume without weighing it down.