A flat foundation brush is a makeup tool with dense, soft, synthetic bristles in a flat, often rounded or arched head, designed to buff and blend liquid, cream, or powder foundation for a streak-free, airbrushed finish, providing even coverage by patting, pressing, or sweeping product onto the skin without absorbing excess. Its key features include dense, high-quality fibers, an ergonomic handle, and versatility for flawless, buildable application.
