I too am a big fan of these. I toss a few "Hot Hands" or "Body Warmers" in my sleeping bag 20 minutes or so before I turn in for the night and if it's really cold I'll stick some "Toasty Toes" on my socks too.

And I use them in the daytime if it's cold. I usually try and get some in the "Clearance" isles at Wal-Mart this time of year. I've got them as low as 25¢ a pack before. No luck so far this year though frown
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