Cold weather gear

[kentref]

I was in a local outdoor equipment store the other day and when I asked about "hand warmers" the guy asked whether I wanted the ones in the small packs or the (and I am not kidding on this), "the chemical ones that smolder."

I had visions of smoke coming out of my muff - and the coach on the sideline thinking - "hey, that ref's on fire, .....!!

Anyway, a couple of you have mentioned that you use "toe warmers" in your shoes. Do you have a specific brand that you use? I'm assuming you mean a disposable type.
Anyone use a battery powered hand warmer (that would fit in a muff)?