In reply to good omens:
No real issues with sweat, (although when I use them for running, they are normally submersed in water at some point, so the big bonus for me is that they don't hold water & don't chill off, really rate them for cold winter running.
Washingwise, usually stick them on a 30 cycle & line dry/stick them on the radiator (don't have a tumble drier).
It seems that the sky is the limit these days for gear prices, just found these to do the job, at a nice price, I'd recommend them.
Not familiar with Wigwam.
Hope this helps!