Level up your colour-care and activate glass-like shine up to 3-days* using the Acidic Color Gloss Shampoo. This revolutionary technology combines an advanced pH formula and Acidic Shine Complex, so your colour remains vibrant with a professional gloss after every use. Citric Acid works by rebalancing the hair back to its healthiest pH , sealing the cuticle, so your salon colour is locked in and protected from dulling agents such as pollution and heat. The sulphate-free formula provides a gentle-lather, smoothing each strand from root to tip, preventing the fading of your hair colour during the cleansing process for more vibrant, healthy-looking hair. With Redken's game-changing Acidic Shine Complex, you can now level up your colour-care by activating a professional gloss at home for glass-like hair. Formulated with a blend of amino acids and conditioning agents, the complex works by depositing glossing molecules across the hair for a mirror-like shine. With every application achieve s