Acidic Perfecting Concentrate Treatment is Redken's most concentrated all-in-one formula for restoring strength to all types of damaged hair. This leave-in conditioning treatment provides ultimate strength repair, intense conditioning and protection against hair fading. With citric acid, this leave-in treatment rinse contains a concentrated care complex that strengthens weakened bonds in your hair to improve hair strength. This leave-in conditioner strengthens damaged hair, provides heat protection up to 450 degrees, tames frizz, adds shine, and reduces hair breakage. This pH-balancing leave-in conditioner is specifically formulated with an acidic pH to defend against the negative effects of hair coloring, styling tools, and even water. The result? Healthy hair.