Our hair care complementary color hair mask is carefully formulated from collagen and argan oil. Designed to hydrate hair and relieve dryness. It is very convenient to use: 1. Wear gloves and apply an appropriate amount of mask evenly to dry hair. 2. Let it sit for 15-20 minutes to allow nutrients to penetrate deep into the hair. 3. Rinse the mask thoroughly with water and blow dry or air dry naturally. And can complement the color to make the hair color more even.