Redken Extreme Shampoo & Conditioner Duo — Professional Strength Repair Restore damaged hair with this professional-grade duo. Each 33.8 oz bottle delivers clinically proven results: 73% reduction in breakage with protein-infused formulas designed for all hair types. Shampoo cleanses and strengthens with 3% Strength Complex, removing buildup while fortifying each strand. Conditioner detangles and reinforces with 4% Strength Complex, sealing in moisture and preventing split ends. Together, they work to repair, protect, and restore hair's natural resilience—ideal for color-treated, chemically processed, or compromised hair seeking professional salon results at home.