Level up your colour-care and activate glass-like shine up to 3-days (Consumer test using full system of Acidic Color Gloss) whilst keeping hair protected with Acidic Color Gloss Heat Protection Leave-In Treatment. Formulated with Redkens exclusive Acidic Shine Complex and Invisible Shield Technology, this formula deposits a professional gloss that not only looks but feels healthy and hydrated for up to 72 hours (Acidic Gloss leave-in vs. non-conditioning shampoo). The Complex works by restoring the hair back to its healthiest pH [pH 4.5-5.5] and by sealing the cuticle, so your colour remains vibrant and your hair looks and feels healthy after a single application, for up to 13x smoother hair (Instrumental test leave-in vs. non-conditioning shampoo). With The New! Invisible Shield Technology, you can now achieve glass-like shine without compromising the integrity of your hair. By sealing the hair with an invisible protective layer, this technology defends the cuticle from heat-damage up to 230Cand protects from other dulling agents, extending the look and feel of your professional gloss as well as combating frizz for a smooth and silky finish after every use.To use: Use as a complete regimen with the full Redken Acidic Color Gloss system.Step 1: Apply Acidic Color Gloss Shampoo to wet hair, lather and rinse. The formula is sulphate-free to allow for gentle cleansing.Step 2: After shampooing, towel-dry hair before using the Activated Glass Gloss Treatment. Apply to mid-lengths and ends and leave on for 5 minutes. Then rinse. Use weekly, starting one week after colouring services. It is recommended to wear suitable disposable gloves. Step 3: Next apply Acidic Color Gloss Conditioner on mid-lengths to ends to lock in moisture. Then rinse. Step 4: Protect your colour and seal in your routine with Acidic Color Gloss Heat Protection Leave-In Spray. Apply liberally to damp hair before styling. In case of contact with eyes, rinse them immediately.