JOICOK-PAK Color Therapy Shampoo and Conditioner DUO 33.8oz These shampoo and conditioner are specially formulated for color-treated hair helps preserve your investment, keeping color vibrant for up to 8 weeks. They gently cleanse away dirt and buildup without stripping essential moisture, so your hair stays fresh, soft, and radiant. With every wash, they also help defend against future damage—leaving your color looking salon-fresh longer.