If your foundation looks extremely thick or streaks after it has been applied, and you are not getting the seamless and flawless finish you are looking for, then you may be using the wrong brush or a poor quality brush. Each MAC foundation brush has been designed with performance in mind for flawless and even finishes during each application. Find a vast inventory on eBay that can cater to your needs and expectations. Each foundation brush is suitable for any emollient formula, and can be used for both powder and liquid foundations. Featuring a blend of both natural and synthetic fibers, each foundation brush can easily pick up and release the pigmented foundation, as well as blend and diffuse the product onto your skin for a soft and flawless look. Proper brush application helps your foundation go on smoothly and blend into your pores to reduce discoloration, blemishes, and other flaws. The design of each brush, and the way that the fibers are arranged, allows for each brush to apply the foundation differently, which can be beneficial depending on whether you want a light or full coverage. You should clean each MAC foundation brush that you use at least once a week with water and gentle soap to prevent product from building up within the fibers and bacteria from accumulating. A cleaner brush can offer a better, smoother application.