To use this powder, first apply your Dermacolor Camouflage Creme as usual. Then, take the included powder puff and gently dip it into the powder. Tap off any excess powder and then lightly press and roll the powder puff over the areas where you've applied the creme. This will help set the creme and give it a waterproof and matte finish. When it comes to storage, keep the powder in a cool, dry place. Avoid getting it wet. If you have sensitive skin, test the powder on a small area of your skin first to make sure you don't have any allergic reactions. Also, don't share your powder puff with others to prevent the spread of bacteria.