I like the 4x4 Handwarmers and throw them in the bottom of my waders.
I will activate two and throw them in my waders as I'm getting dressed and put two fresh ones in right before I put my waders on.
NRA Life Member
Big Sister: "You should be sponsored by Allen"
Me: "If you can't shoot good, at least look good walking to the firing line."
Big Sister: "Can you not afford a Pelican? Then buy an Allen gun bag."