I only use it for watching films together with the ARC. I wear it for three hours at a time and have to say it's only comfortable at the beginning, when the Temperfoam gets warm the padding gives way and starts to pinch. At first I had a lot of problems with it and had to take it off every half hour, but now it's better because I've got used to it. The ear cup is unfortunately a bit small, so if you have big ears you might have problems.

The Sonos Ace are by far the most comfortable and best headphones. You can wear the Sonos Ace for several hours without any problems, they adapt well to the shape of your head.
Have fun

I find them super comfortable and they are very easy to adjust. They are also great for sports.
The sound is also great.

Yes, the helmet is very comfortable. The size of the head doesn't really play a role, I think.

Moderately comfortable. Gives me hot ears