A fan brush is a type of paintbrush characterized by its unique shape, which resembles a fan. It features bristles that are arranged in a flat, spread-out manner, allowing for a variety of painting techniques. Artists often use fan brushes for blending, creating textures, and applying delicate details in their artwork. In addition to painting, fan brushes are also popular in makeup application. They can be used to apply highlighter or blush, providing a soft and diffused look. The versatility of the fan brush makes it a valuable tool for both artists and makeup enthusiasts.