Using the Cosmic Moon Metallic Hair Streaks is super easy. First, make sure your hair is wet. Then, take the included 15ml tube and use the brush applicator to apply the hair streaks to your hair. You can choose from 8 metallic colors to match your costume. After you've had your fun at the party, wash your hair with shampoo to get rid of the color. This product is for adults only, so keep it away from children. And because it's dry clean only, don't get it wet in other ways except when applying and washing it out. Also, always remember to keep it away from fire to ensure safety.