10.1 oz Redken Extreme Length Shampoo is a strengthening shampoo with biotin that gently cleanses while helping to fortify strands from root to tip. This biotin-infused shampoo helps to strengthen damaged hair so it can grow longer and helps to reduce the look of split ends. *When used as a system of Extreme Length Shampoo, Conditioner and Sealer vs non-conditioning shampoo. Grow Longer Hair: Redken Extreme Length Shampoo helps strengthen damaged hair so it can grow to its maximum potential Biotin for Stronger Hair: Formulated with biotin, the shampoo helps to fortify and strengthen hair for 81% less breakage* Visibly Reduced Split Ends: Promotes healthy, strong hair from root to tip, helps prevent split ends and reduce the look of split ends by 78%* For All Hair Types & Textures: Ideal for hair that is fragile, damaged, and prone to breakage, so you struggle to grow it long Root-to-Tip Care: Gently cleanses hair while Redken Length Care Complex helps strengthen damaged hair