Activate glass-like shine for up to 3-days* using Redken's Activated Glass Gloss Treatment. This revolutionary technology combines an advanced pH formula and Acidic Shine Complex, for results that not only look but feel healthy, with up to 3-days of sleek, frizz controlled hair** Citric Acid works by restoring the hair back to its healthiest pH , sealing the cuticle, so your shine is locked-in and your hair left incredibly glossy and smooth, for up to 3-days of glass shine*. The Exclusive Acidic Shine Complex is formulated with a blend of amino acids and conditioning agents that deposit glossing molecules, further supporting the look of healthy, glass hair with a single application. Using weekly after shampooing, apply the treatment from mid-lengths to ends of damp, towel-dried hair and leave on for 5 minutes***. Then rinse. Apply the Acidic Color Gloss Conditioner to lock in moisture, rinse. For added protection and extended colour-vibrancy and shine, seal your routine with the Acidic