Quick note:
Remember to look at the location of the person and read the responses in light of where they usually are and the heat/humidity that are used to.
Alaska hot is VERY different than South Carolina/Georgia/Florida hot, which is different than Buffalo, New York. Hot in Denver, CO is a dry heat, which "feels" cooler to me (than Carolinas/Georgia), but dehydrates me faster. Scotland "hot" is cooler than it is here today/now (mid 80s F).

Point? Heat/humidy are relative (if you excuse the bad pun).

Back to topic now.
PV has a HUGE following, as does worsted wool.
I THINK of Phoenix, Arizona as hot, dry, which may or may not be true.
Here (South Carolina) is hot (upper 90s F) and usually very high humidity (feels MUCH hotter than temp actually says).

Does the PV breath well with the synthetic material and PV coating?
(Rocky, I am seeking "experiencial" thoughts from those in areas that are upper 90s to 100s F most of summer, rather than the chart- which is VERY interesting, by the way -> no offense intended).
I know worsted does (amazingly cooler than most would expect).