REDKEN Acidic Perfecting Leave-in Treatment is Redken's 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.  The Benefits: All-in-one care provides a 56% reduction of breakage* 11 times smoother hair** 82% reduction of visual split ends** Colour Fade protection and ultimate conditioning