When I did a lot of layout hunts I used hot hands religiously. It's Illinois where the ground freezes where you use a drill to put out your decoys.
Get gloves big enough to where you can put a hot hands in each glove. I always wore a flannel shirt with two breast pockets. Put hot hands in them along with a pair of them in your front pants pocket. Maybe sit on them too.
There were hunts where I used 4 or 5 packs.
They really should design some clothes with pockets in very specific places. (for hot hands)
Put one set of pockets just under your armpit on each side. Another set on the inside of each leg. (groin area)
The idea is to heat the blood going to your extremities. It works!
You can extend one of them miserable hunts long enough to get your birds. Many times in this area you have to sit thru a nasty storm to kill the easy birds. Any other time is a waste of time in general.