Redken ACIDIC BONDINGDAMAGED Shampoo Conditioner 16.9 oz Brand New Authentic Qty-1 Acidic Bonding Concentrate Sulfate Free Conditioner for Damaged Hair 16.9 oz Qty-1 Acidic Bonding Concentrate Sulfate Free Shampoo for Damaged Hair 16.9 oz WHAT IT IS Acidic Bonding Shampoo is Step 1 of Redken's most concentrated system ever. This sulfate-free shampoo provides an all in one solution to address all types of hair damage, even the most processed hair. A little goes a long way! This product is ultra-rich and thick in consistency and will coat your hair with less product than your average shampoo. We recommend you start with a quarter size amount and increase from there based on your hair type. WHAT IT DOES Made with Citric Acid and Redken's Bonding Care Complex, this sulfate-free shampoo helps reinforce weakened bonds, provides strength repair, intense conditioning and color fade protection.