Level up your colour-care with +76% glass-like shine using the Acidic Colour Gloss Sulphate-Free Shampoo. This revolutionary innovation combines an advanced pH-balancing formula and Acidic Shine Complex, so your colour remains vibrant and with a professional-grade gloss after a single application.The acidic formula works by restrengthening the hair back to its healthiest pH [pH 4.5-5.5], sealing in the cuticle, so your colour is locked in and protected from dulling agents such as pollution and heat. Inspired by Redken’s iconic Shades-EQ, the Complex is formulated with a blend of amino acids and conditioning agents that deposit glossing molecules to the hair for glass-like shine.