I have 2 boot dryers. They are on the end of my legs. Seriously though, I had issues with cold/wet feet when hunting here in the NW. I finally took a gamble and bought a pair of hunting boots from Cabelas. They were advertised as "insulated and waterproof" and my first thought was "yeah, sure". They had a guarantee so I went ahead and bought a pair. That first day out hunting I walked into the river to a depth of about 6 inches and stood there for 4 or 5 minutes. Lo and behold, no water. I hunted all day in damp ferns and grass and the only dampness was where my pants touched the top of my socks. I tested the insulation during the late hunt and found that I could walk in snow or be on stand for several hours and still have warm feet. So in my estimation, a boot dryer is OK if you have a place to plug it in.