Repair inner curl strength and restore your curl pattern with Redken's Acidic Bonding Curls! The Acidic Bonding Curls Shampoo gently cleanses and improves curl pattern of curly and coily hair, types 3A - 4C. Powered by the Curl Bond Technology, Acidic Bonding Curls is formulated with Citric Acid and Glycine that penetrate the hair cortex to build bonds and repair the curl strength from the inside-out. This technology rebalances hair back to its healthiest pH [pH 4.5-5.5], sealing in the cuticle, repairing damaged hair to build even stronger hair bonds. The formula is also infused with natural oils such as avocado oil, to help keep curls feeling hydrated. As a result, broken inner bonds are repaired from the inside and the curl pattern is enhanced with natural movement. The range is also sulfate-free to provide gentle cleansing and silicone-free for lightweight, bouncy curls which feel hydrated. Recommended for curl types 3A - 4C.