4- BOXES-NEW Schwarzkopf Color Boost Color Vibrancy Booster -Golden BOOST YOUR COLOR: Schwarzkopf Color Boost is an in-shower customizable color vibrancy booster to be mixed in with your favorite conditioner CUSTOMIZE YOUR INTENSITY: Color Boost color drops let you customize your color intensity (1 drop = minimal boost, 5 drops = maximum boost) ENHANCE COLOR VIBRANCY: With Color Boost you can enhance color vibrancy between salon visits or colorings. EASY TO USE: Color Boost offers an easy solution to revive the intensity of your hair color. Just mix 1-5 drops into your conditioner. AMMONIA FREE: No ammonia, no peroxide, no alcohol, just color.