The shampoo is 100% sulphate free, making it gentler and kinder on the hair. It has an intensely nourishing formula designed for use on salon lightened brunette-dark hair tone. It is formulated with deep blue pigments to neutralise unwanted red/copper/brassy tones. It can also be used as a toner after the lightening process. It is fabulous at removing unwanted red tones from violet shades.