I also have the overheating problem with m50. My room can get hot enough even with AC on(I live in Miami) so wearing pleat pads is not comfortable. So getting velour pads for m50 is not a option FWIR, maybe i'll get myself a pair of open cans at home, or any more suggestions for the pads?
It'd have to be velour that makes a decent seal. Thankfully I think this summer has been cool where I live, only had to turn on the portable AC a few days.