Round brushes are a type of hair styling tool designed with a cylindrical shape and bristles that wrap around the barrel. They come in various sizes, allowing users to create different styles, from loose waves to tight curls. The round shape helps lift hair at the roots, adding volume and creating a smooth finish. These brushes are commonly used with a hairdryer to achieve a polished look. When combined with heat, the bristles help to shape and curl the hair, making them popular among both professionals and at-home users. Hairdryers and styling products often complement their use for optimal results.