Redken Extreme Shampoo 300ml Double | Best Professional Haircare Combo | Strengthening & Damage Repairing | Protein Rich Cleanser | Stronger Hair Solution | Salon Quality Hair Care Redken Extreme Shampoo 300ml Double. The best professional haircare combo for strengthening & damage repairing. Revitalize and strengthen your hair with this professional formula is designed to repair damaged hair, leaving it feeling soft, smooth, and healthy. Infused with protein and ceramide to fortify strands from root to tip, this shampoo doubles the strength of your locks while gently cleansing away impurities. Say goodbye to breakage and hello to resilient, beautiful hair with Redken Extreme Shampoo!