What it is: A double-ended brush designed for extremely precise concealer application.What it does: This unique, double-ended brush with a silicone tip allows you to apply concealer to the small areas of the face—including the under-eye area, blemishes, and dark spots—with controlled precision. The brush side helps to blend product seamlessly for a flawless finish. Developed specifically for the Ultra HD Underpainting Palettes (sold separately), this brush can also be used to apply any of your go-to concealers.