A blend of synthetic fibers molded into a square shape that allows you to reach the corners and edges of the face. This mix of fibers provides the perfect application of foundations. The thick black fibers allow for good pickup and release, while the fine white fibers blend and diffuse foundation onto the skin with ease. MAC professional brushes are hand sculpted and assembled using the finest quality materials. 100% synthetic brushes incorporate the latest innovations in fiber technology for superior performance and improved longevity.