I'm EMF concerned but still need wireless headphones to watch films on my projector without bothering neighbors.
They need to be powerful, robust, highly user friendly and not give EMF-related headache/cancer.
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I've not tried these personally - and as with any headphones, its a good idea to try any headphones for fit (tight headphones cause headaches) and sound quality if possible, but it sounds like considering your fear of EMF, you might want to consider a IR based unit. IR's basically the same technology used in remote controls, is line of sight, and its technology that's been in common use since the 70s.
Based off the models the wirecutter tried (and sadly, they didn't do a proper review on this, other than saying they weren't really into IR) and the reviews for the model on the amazon link the Sony MDR-IF245RK might be a model.
Most folks report that its comfortable, but you may need to check the cables you need. Since its IR, if you pick up a second unit, you can use the second headset with the same transmitter (which is handy for movies).
And while I'm personally skeptical of EMF 'sensitivity', I don't think anyone's ever complained of IR sensitivity yet.