What It Is Redken's Acidic Color Gloss Shampoo is a ph-balanced acidic sulfate-free shampoo for clients with color-treated hair to help prolong salon-grade haircolor and intense shine. • Your Shades EQ insurance. • Salon-inspired glossing range for lasting color vibrancy up to 32 washes* & revolutionary shine. *System of Acidic Color Gloss Shampoo & Conditioner