I agree with some of the other negative reviews. I've used the Revlon dryer styler round brush for years. When they die, I replace them. The former one didn't last as long as the others and this new one has designed those openings to keep it from overheating. Well, not only does it vent very hot air, it blows the surrounding hair in all directions, undoing what you just did. I came online to try to track down an older model.