N6 Foundation Brush This brush is designed to apply foundation and creamy highlighters because it's the most effective way to contour the nose bridge and cheekbones. 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 lovely, zip-closure transparent plastic bag. which is highly useful for maintaining it.