Here’s the concept: string a little wire through an ordinary pair of wool socks and apply a little direct current from a D-cell-powered battery pack, and bam! You’ve got warm feet. Most manufacturers claim that the amperage is so low that shock isn’t really a concern. In fact, a number of stores sell ’em for us in waders.
But though I’ve seen these in stores many times, I’ve never actually owned a set. A set from Hammacher Schlemmer claims to run for 12 hours on a set of two D-cells, but is that realistic? And how warm do these get? Warm enough to make it worth carrying around the battery pack? Or is a chemical solution better?
Let me know in comments. I’m big on not being cold, and if this is a valuable tool in that arsenal, maybe I’ll shell out $25 for a pair.