Redken's Acidic Bonding Concentrate Quad contains the following four products:x1 Redken Acidic Bonding Concentrate Shampoo 300mlx1 Redken Acidic Bonding Concentrate Conditioner 300mlx1 Redken Acidic Bonding Concentrate Intensive Treatment 150mlx1 Redken Acidic Bonding Perfecting Concentrate Leave-in Treatment 150ml Redken Acidic Bonding Concentrate Intensive Treatment 150ml The first step in Redken's Acidic Bonding Concentrate regimen, the Intensive Pre-Shampoo Treatment. With Redken's highest level of Citric Acid + Bonding Care Complex, this rinse-out treatment repairs broken, damaged hair so you can expect smoother locks with less breakage. The concentrated intensive treatment formula reinforces weakened bonds and prepares hair for the full benefits of the Acidic Bonding Concentrate Shampoo and Conditioner. Redken Acidic Bonding Concentrate Shampoo 300ml Redken's Acidic Bonding Concentrate Shampoo. Redken Acidic Bonding Concentrate Sulfate-Free Shampoo is Redken's most concentrated all-in-one formula for strength repair for all types of damaged hair. This ultra-rich and luxurious sulfate-free shampoo provides ultimate strength repair, intense conditioning and color fade protection. Redken Acidic Bonding Concentrate Conditioner 300ml Redken's Acidic Bonding Concentrate Conditioner. Redken Acidic Bonding Concentrate Sulfate-Free Conditioner is Redken's most concentrated all-in-one formula for strength repair for all types of damaged hair. This ultra-rich and luxurious sulfate-free conditioner provides ultimate strength repair, intense conditioning and hair color fade protection. Redken Acidic Bonding Perfecting Concentrate Leave-in Treatment 150ml Redken's Acidic Bonding Perfecting Concentrate. Redken Acidic Perfecting Concentrate Leave-In Conditioner is our most concentrated all-in-one formula for strength repair for all types of damaged hair. This conditioning leave-in treatment provides ultimate strength repair, intense conditioning and hair color fade protection.