Sulfate-free. Amino-ions. Gently cleanse, 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 attract to the hair fiber to form a barrier. Lightweight and non-stripping, hair feels fortified and color radiance is secured for optimal looking vibrancy. Safe for color-treated hair.