Kérastase Soleil Masque UV DÉfense Active is an after-sun treatment to repair coloured hair exposed to the sun. It protects against both UVA & UVB rays by creating a hydrophobic barrier, by strengthening the hair & improving the surface to the hair. Hair is left soft & shiny with long-lasting colour radiance. The Kérastase Soleil range is the first range to offer customised protect & repair indexes for your hair.