Haven't heard of that. I have a cooling vest. It's me putting ice cubes in my bra 'tween the girls (my bra becomes a catch-all for many things, it seems). You'd be surprised how long the ice will stay and how cool it makes you. Learned that when training for my Ironman and being out on Saturdays in the heat of summer for 7-8 hours at a time.
We're having your weather, and you're having ours. Can I please have the higher temps, lower humidity and less rain back please? You can have this rain and extra high humidity with temps in the 80's.