Used by professionals. With fade block technology. Use with color lock treatment to retain color up to 5x longer. Retain your hair color up to 5 times longer! Breakthrough Technology: Introducing ColorThrive, with Fade Block Technology, an exciting new system that helps block your hair color from fading, retaining your color up to 5 times longer (when using ColorThrive shampoo, conditioner and color lock creme or spray vs. ordinary shampoo and conditioner [color loss due to washing of hair]). Uniquely Formulated: Non-color depositing formula designed specifically for brunettes and redheads to maximize vibrancy and shine. This product is not tested on animals. Professional. Affordable. TRESemme. Made in USA.