A hair straightening hot brush is a styling tool that combines the function of a straightening iron and a hairbrush. It is designed to straighten hair while also detangling and smoothing it. The brush has heated bristles that help to straighten hair by creating a sleek, straight finish. The temperature of the brush can be adjusted to suit different hair types, and it typically heats up quickly, making it a convenient option for those who are short on time. Some hot brushes also come with additional features such as ionic technology to reduce frizz and static, and ceramic or tourmaline plates for even heat distribution and protection against heat damage.