Stock up and save with this great-value double set of Redken Extreme Length Shampoo, containing 2 x 300ml bottles. Enriched with biotin, this shampoo gently cleanses and fortifies damaged hair, promoting longer and stronger growth. It expertly protects hair lengths and prevents breakage. For optimal results and up to 81% less breakage, use the complete Redken Extreme Length System, including the Conditioner and Length Sealer Leave-in Treatment.