Kérastase Reflection Masque Chromatique treatment masque for very sensitised or highlighted hair. Aqua-Ionic System: an ionic polymer infuses the hair fibre with active emollient & shine enhancing ingredients. A hydrophobic film is formed around the fibre to help protect the moisture level in the fibre & locks out humidity. Caring & Protecting ingredients to limit damage caused by external affressions & protect coloured hair. Protects against loss of shine, hair feels soft & manageable. Suitable for thick hair.