Redken's Extreme CAT Protein Reconstructing Hair Treatment is a strengthening protein spray that reconstructs, reconditions, and adds immediate strength without adding weight using patented Taurine technology and cationic proteins. This rinse-off treatment is the perfect prep spray to use before chemical treatments to prevent damage while although it can also be used regularly to prevent breakage and split ends. Formulated with our exclusive Interbond conditioning system that delivers a unique 3D repair complex containing Proteins, Ceramide, and Lipids, your hair will be internally strengthened and externally protected.