What happens to a hair continuously exposed to the sun? It becomes vulnerable and defenseless, loses its color intensity becoming> arid, sensitized and opaque.The Kérastase Soleil line is an exclusive treatment to protect and repair hair from UV rays, without sacrificing cosmeticity: shiny, always soft and beach-proof hair. The Soleil line composes a protective range that cleanses, improves shine and adds to the hair fiber oils that combat hair drying, making them finally smooth and shiny.