Acidic Perfecting Concentrate Leave-In Treatment is Redken's most concentrated all-in-one formula for building resilience in all types of damaged hair. Its sulfate-free and ultra-rich formula exceptionally reinforces hair resilience, deeply conditions and protects against color fading.

The concentrated repair complex of the leave-in treatment contains citric acid to help strengthen weakened hair bonds to make hair stronger. This treatment strengthens the resilience of damaged hair, protects it up to a temperature of 450 degrees, tames frizz, gives shine and reduces breakage.

Its acidic pH formula balances the pH of the hair to protect it from the harmful effects of coloring, styling devices and even water. Results? The hair looks and feels healthy!