Redken Acid Bond 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.
Featuring Citric Acid, this conditioner contains a concentrated bonding care complex that reinforces weakened bonds within your hair to improve hair strength. This pH-balancing conditioner is specifically formulated with an acidic pH to defend against the negative effects of hair coloring, styling tools, and even water. The result? Hair that looks and feels healthy!
Benefits:

56% less breakage
82% less visible split ends
11x smoother hair
pH balancing
For all hair types and textures
Ulimate repair, intense conditioning, and color fade protection
Citric Acid, an alpha hydroxy acid, which helps reinforce weakened bonds in the hair