That’s the very reason I bought them. I find the PU-leather ones that came with the original VR Covers interface are the most comfy (and more comfortable than the velour ones, having spent the last 3 hours in VR with them fitted), but the sweat stays on the pad and your face. This also causes fogging of the lenses.
So far I have had no fogging, but I’ve not been as warm today - and with a 16 inch fan behind me, even less so.
I can see the velour ones being better in humid conditions - they will likely soak up at least some of the perspiration and they can be washed, so a bonus.
When I sat down to start my sesh I was a bit damp on the skin having just been walking the dog in the Sun, so the no fogging bit is a plus. If there are any issues I will post about it.