Level up your Color-Care with +76% Glass-Like Shine* using the Acidic Color Gloss Sulphate-Free Shampoo. This revolutionary technology combines an advanced pH formula and Acidic Shine Complex, so your colour remains vibrant and with a professional-grade gloss after one use. Citric Acid works by restrengthening the hair back to its healthiest pH , sealing in the cuticle, so your colour is locked in and protected from dulling agents such as pollution and heat. The sulphate-free formula also 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-grade gloss at home. 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 shin