Looking for open-back wireless headphones

My head is big, which makes it harder to look for comfortable headphones than I thought. The Steelseries and Corsair HS80 are too small and leather-ish cushions make me sweat quite fast.

The best thing that has come to me is the Beyerdynamic TYGR 300. It’s open-back and I can hear myself talking, sound is great, it’s comfortable for hours (for work and gaming) and big enough for my head. The only problem is the wire.

I’d like to walk to stand up without putting them off or stopping my music or missing out on conversations. And I can’t find a device to plug the headphones in that connects it via bluetooth or whatever to my PC. If you know anything, please let me know.

In the meantime I’m still looking for something like the Beyerdynamics mentioned, but wireless. Any help would be appreciated!