Pure Blonde Booster Colour-Correcting Weekly Shampoo is an intensive brightening once-a-week use purple shampoo for both natural blondes and coloured blonde hair. Creating a high shine and glossy finish, this shampoo contains highly concentrated violet pigments which work to remove any brassiness or warm tones in blonde hair. This ultra-conditioning formula also contains anti-frizz properties to reduce static and smooth the cuticle.