We craft bespoke in-salon treatments using our pioneering professional techniques and rituals to deliver the deepest care and the highest efficiency for each hair need. Fusio-Dose is our back-bar signature, a groundbreaking professional gesture. Kérastase offers multiple care combinations for a custom-designed treatment that delivers instant and long-lasting hair transformation Along with our community of hairdressers, we are devoted to caring for your hair, so you can be bold. You can be true. You can be you.