JOICO K-Pak Color Therapy Color-Protecting Shampoo 1L This specially-formulated shampoo for color-treated hair preserves your investment from fading for up to 8 weeks, while it gently cleanses away dirt and debris. With every wash, you’ll also protect hair against future damage. Benefits Maintains over 82% of haircolor for up to 8 weeks* Repairs & strengthens damaged hair** Instantly 9X stronger hair † Twice the shine † † Gently cleanses color-treated hair Improves elasticity and shine Helps restore and protect hair* When using K-PAK Color Therapy Shampoo and K-PAK Color Therapy Luster Lock Multi-Perfector ** Against combing breakage on damaged hair vs. a non-conditioning shampoo † Against combing breakage on damaged hair vs. a non-conditioning shampoo; when using Luster Lock Treatment † † vs. untreated hair; when using Luster Lock Glossing O "E"