These things are unreal.  I use them for hunting, fishing and snowmobiling.  One thing you MUST keep in mind with these: they are designed to work on very voltage (you can run it on a battery box) and they do not blow voluminous amounts of hot air like other driers--what they do is trickle a small amount of heat to the tip of the things that insert into your boots, which, by physics of hot air rising, eventually dries your boots.  Downside, of course, is that it takes a few hours to fully dry damp boots, as compared to a unit that blasts air into boots--but, this is the only unit I can run on my 12v power outlet in my truck!  It's such a great thing to have (only thing) to dry boots when you're out in the sticks and sleeping outdoors, I can literally plug it into my truck 12v outlet (using an inverter), place it on my passenger seat, throw my boots on, and they're dry in an hour or two : )  Made in the USA, which I appreciate.  Overall, excellent product, will buy more!