As a weekly dose of nutrients, TIGI S-Factor Color Savvy Balance Booster is formulated to seal in moisture and add superior shine to your hair, also leaving your colour vibrant longer. How to use: Use after shampooing by applying ½ to 1 full tube as needed based on your S-factor Professionals recommendations. Leave in 5-10 minutes, then rinse. Use once to twice a week depending on the complexity of the hair colour and damage to the hair.