Color captivating care for color-treated hair. 5th avenue NYC. Color locking system (System of shampoo and conditioner). Detangle, strengthen and protect color-treated hair with the Color Extend Magnetics system (System of shampoo and conditioner). Redken's exclusive Interlock Protein Network and charge-attract complex deliver charged amino-ions that are attracted to the hair fiber to form a barrier. Hair feels fortified and repaired for a reflective looking finish.