N4 Shadow Brush for Eyes The compact bristles of a flat blending brush allow for a little more targeted application. It is therefore perfect for blending any sharp shadow lines. USE GUIDE Rinse under running water. It is advised to use Delfy Face cleansing mousse for optimal results. Never use a fan or other high-temperature device when it's dry. Maintain cleanliness at all times. includes a clear plastic tube. which is highly useful for maintaining it.