Redken Extreme Shampoo cleanses and restores strength to distressed hair so it looks and feels healthier and more manageable. For hair that is up to 4 times stronger. Extreme Shampoo strengthens and resurfaces chemically and mechanically distressed hair. Redken's exclusive Interbond Conditioning System delivers a unique 3D Repair Complex to fortify hair so it looks and feels healthier with increased manageability and shine.