This leave-in hair care combines the revitalizing powers of four exclusive honeys chosen by Guerlain Research with Honey Bond-Protect Complex technology to deeply revitalize the hair fiber and protect it from humidity, pollution and heat-styling tools up to 466°F. The fruit of more than 15 years' research into the powers of honey, Guerlain has created Blackbee Honey Repair technology, which combines four powerful revitalizing honeys with expert functional ingredients for hair inspired by dermocosmetics: restructuring phytoceramides, smoothing arginine, fortifying D-panthenol and a color-protecting cassia alata extract. The Honey Bond-Protect Complex technology combines royal jelly and Aland honey, which are rich in cysteine, for a bond-building action that protects and recreates hydrogen bonds at the core of the hair fiber. Enriched with a beeswax butter, it creates an invisible film on hair's surface for optimal protection of the fiber. From first use of this leave-in treatment, hair is more resistant against breakage and frizz is controlled. Day after day, hair is soft and shiny.