Schwarzkopf BC pH 4.5 Color Freeze Micellar Shampoo Sulfate-Free is a gentle color-locking shampoo that helps you prolong and maximize the intensity of your hair color between salon visits. Unlike traditional color care products, this shampoo doesn’t just seal the hair cuticle in order to prevent pigments from leaching out; instead, it acts deep within the hair strand with the exclusive pH 4.5 Balancer technology. This patented innovation not only restores the hair to its optimal pH value, but actually stabilizes and strengthens the hair matrix, keeping the color pigments locked inside the hair. Gentle enough to be used every day, this micellar shampoo helps you achieve stronger, more resilient hair with minimal color fade. Your locks appear as vibrant as they did on day one—and remain that way!