Foundation brushes are makeup tools designed to apply liquid or cream foundation evenly across the skin. They typically have dense, synthetic bristles that help blend the product seamlessly, providing a smooth finish. The shape of the brush can vary, with options like flat, rounded, or angled heads to suit different application techniques. Using a foundation brush can enhance the overall look of your makeup by allowing for better control and precision. Many people prefer them over sponges or fingers because they can create a more polished appearance. Proper cleaning and maintenance of foundation brushes are essential for hygiene and longevity.