two parallel universes
one – WPB works in most cases
two – WPB is a scam that doesn’t work
the big thing I’ve noticed is that when I forget to remove insulation, I’ll sweat more and there’ll be condensation inside the WPB
full zipper in front helps to remove excess insulation without having to stop and take it off. Or pit zips, but I’ve not found those to be very effective
most WPB don’t work very well, polartec neoshell works. there’s a couple with dry and air in the name mentioned above.