Biolage Color Last Shampoo is essential for maintaining colored-treated hair health and repairing damage. This nourishing shampoo protects hair from environmental damage and strengthens hair while hydrating. Packaging may vary. Low pH shampoo for color treated hair helps prolong color vibrancy Gently cleanses to prevent unnecessary stripping of color Paraben-free Suitable for color-treated hair and non color-treated Research Results Helps preserve salon-vibrant color for up to 9 weeks* *When using the professional products system of ColorLast shampoo and conditioner vs. a non-conditioning shampoo