Round brushes. this kind of brushes has bristles all around its perimeter. Normally they are used to give shape to the hair when you dry it. You can create curls, waves and you can get a perfect straightening. The thermal brushes are a kind of round brush but with metallic bristles. When it is hot, it acts like a roller helping to create curls easier. They are brushes with different sizes and you will be able to create different curls with them.
