This leavein haircare combines the revitalizing powers of 4 exclusive honeys chosen by Guerlain Research with Honey BondProtect Complex technology to deeply revitalize the hair fiber and protect it from humidity, pollution, and heatstyling tools up to 466°F/230°C. What It Does From the first use, hair is more resistant against breakage, and frizz is controlled. Day after day, hair is soft and shiny. Revitalizing Action: The fruit of more than 15 years' research into the powers of honey, Guerlain