Redken Extreme Length Shampoo 300ml & Conditioner 300ml Duo | Strengthens Damaged Hair | Promotes Healthy Growth with Biotin | Reduces Breakage & Split Ends Redken Extreme Length Shampoo 300ml & Conditioner 300ml Duo | Strengthens Damaged Hair | Promotes Healthy Growth with Biotin | Reduces Breakage & Split Ends The Redken Extreme Length Shampoo & Conditioner 300ml Duo is your solution for damaged hair. Infused with biotin, this powerful duo strengthens weak hair, reduces breakage, and repairs split ends, promoting healthier, longer growth. Perfect for nourishing and protecting hair, it leaves strands visibly stronger, smoother, and more resilient. Ideal for achieving nourished, healthy hair.