What is it? The Acidic Bonding Concentrate Shampoo is Redken's most concentrated all-in-one formula for strength repair for all types of damaged hair. This ultra-rich and luxurious sulfate-free shampoo provides ultimate strength repair, intense conditioning and color fade protection. Key Benefits: 56% less breakage* 82% less visible split ends** 11x smoother hair** pH balancing For all hair types and textures Ulimate repair, intense conditioning, and color fade protection Citric Acid, an alpha hydroxy acid, which helps reinforce weakened bonds in the hair