Redken Acidic Perfecting Concentrate Leave-in Treatment provides heat protection up to 230 degrees, smoothes, tames frizz, adds shine and intensely conditions to help to reduce hair breakage. This pH-balancing leave-in Treatment is specifically formulated with an acidic pH to help to defend against the potential negative effects that can be caused by hair colouring, lightening and heat styling. The result? Hair that looks and feels healthy! Key benefits: - Up to 11x smoother hair.* System tames frizz and adds intense shine. - Heat protection up to 230°C** - Up to 78% of split ends appear reduced*** * When used as a system of Acidic Bonding Concentrate Shampoo, Conditioner and Leave-in Treatment vs Classic Shampoo on bleached hair **When used as a system of Acidic Bonding Concentrate Shampoo, Conditioner and Leave-in Treatment *** Visual Grading. When using Acidic Perfecting Concentrate vs classic shampoo on Bleached Hair