The kristin ess signature hair gloss is an in-shower treatment that deep conditions your hair It creates a protective shield over the hair to instantly boost shine and help lock-in your color A smooths and softens hair from root to tip making hair more manageable Protects from color fading by preventing hard water minerals from being deposited onto the hair and scalp Color lasts 3-4 weeks and will gradually fade, depending on how often you shampoo.