THE ONE SIGNATURE HAIR GLOSS BITTERSWEET. Benefits: Choose this color if you have dark brown hair and want to neutralize or tone out any warmth or brassiness. Adds depth. Works on color treated and natural dark brown hair. Vibrancy Boosting Technology creates a protective shield over the hair to instantly boost shine and help lock-in your color. Antioxidant Complex smooths and softens hair from root to tip making hair more manageable. Alkaline Neutralizing System protects from color fading by preventing hard water minerals from being deposited onto the hair and scalp. Ammonia-free formula will not lift, lighten, or cover greys. Color lasts 3-4 weeks and will gradually fade, depending on how often you shampoo. Will help you keep your color looking fresh, shiny and healthy. Use this in between salon visits or anytime your hair color needs a boost. For all hair types. Vegan. Formulated Without: Parabens. Phthalates. Silicones. Ammonia. Includes: Kristin Ess Hair Signature Bittersweet Gloss Bottle. Kristin Ess Hair Signature Gloss Applicator Bottle with Activator. Instruction sheet with plastic gloves. Single application.