Doddg you can get what I use for hunting and I work outside year round these work great for warming up your hands when needed.
https://www.amazon.com/HotHands-Hand-Warmers-Odorless-Activated/dp/B0007ZF4OA
Thanks! for being helpful.
I opened the link thinking I was going to see a pair of gloves thin enough for trigger work but efficient enough to keep my fingertips from going numb.
I was surprised to see the hand warmers!
Now that's an old-fashioned remedy from my youth I never thought about!
I've already ordered an electric handwarmer that should see me through any 40-ish degree range visits.