Low pH shampoo for color-treated hair gently cleanses the hair without removing the vibrant color. Over time, color-treated hair may fade and lose its shine. Biolage ColorLast shampoo, which takes its cue from the fade-defying orchid found in nature, helps vivid color-treated hair retain its color depth, tone, and luster. For up to nine weeks, give her hair salon-quality color. For color-treated hair, a low pH shampoo helps maintain the vibrancy of the color. delicately cleans to avoid needless color removal This formula without parabens is safe for color-treated hair. Application: Massage into damp hair, creating a lather. Give it a good rinse. If contact occurs with the eyes, rinse them right away. To help preserve your color-treated hair, we advise using ColorLast shampoo and conditioner in tandem. Dimensions: 1000 milliliters