Kallos KJMN Blueberry Revitalizing Hair Mask, thanks to its high concentration of antioxidants, minerals and vitamins, promptly revitalizes dry, damaged, chemically treated hair. Clean, active avocado oil deeply nourishes the hair and scalp. By using this hair treatment, you will become healthy, elastic and shiny. How to apply: Step 1. Apply to clean, towel dry hair. Step 2. Leave for 5-10 minutes, then rinse thoroughly.