Glo Skin Beauty 104 Dual Fiber Face Brush is a multi-use tool is ideal for lightweight product application and creating soft layers for an airbrushed finish. It is the ideal makeup tool to softly place colour on cheeks or use for lightweight application of liquid and powder foundations. A duo fiber brush is simply a brush with two different fiber, the base is black and more dense, with white soft bristles extending through the top. It works because the shorter hairs help to create a stable base while the longer hairs swirl and blend liquid or powder products effortlessly.