A thermal brush is a hairstyling tool designed to combine the functions of a round brush and a heated styling device. The barrel of the brush is typically made from ceramic or other heat-conductive materials, which retain and evenly distribute heat when connected to a power source. The bristles are heat-resistant, helping to style hair without causing damage. As the brush heats up, it allows users to smooth, straighten, curl, or add volume to their hair by rolling sections around the barrel. This makes it ideal for creating sleek, polished looks with minimal frizz. Thermal brushes are often used in place of flat irons or curling irons to achieve natural-looking styles with less effort.