Formulated without silicones, this shampoo works to strengthen and thicken fine and fragile hair. It acts directly on the hair fiber, helping to give it more substance, so it looks more voluminous. Proven effectiveness : - HAIR IS 3X STRONGER* - HAIR IS 3X MORE RESISTANT* Pour into your usual bottle. Tightly twist the pump back on. As a committed brand, we are continuously and increasingly challenging ourselves to minimize our environmental impact, such as by offering refills of your favorite products that: - Give a second life to plastic bottles and help eliminate unnecessary packaging, and - Consume at least 77% less plastics compared to our standard containers. *Instrumental test using the Volume & Strength routine (shampoo, conditioner and strenghtening scalp serum) compared to untreated natural hair.