I have bought a boom headset, I used it for an hour and obviously my ears started to heat up and end up with a lot of sweat. How to avoid these heating up?
Use your over-the-ear boom headset only on a well air conditioned room. For rest of the environment a in-the-ear headset is recommended.
Everyone at my work has headphones like this. They have a simple solution: wear them one ear at a time, and switch ears every 20-30 minutes. I'd also recommend listening to it with both ears until you just start to get uncomfortable, then go one ear at a time until you cool down. I know it's probably not exactly what you're looking for, but it works pretty well.