Since we are in the midst of the dog days of August I'd like to point out what I am getting my wife for Christmas. All I have do is to choose which of the 4 to choose. Yes there are 4 different USB heated slippers out there. I was good with none, maybe one.
These buddies get up to 118 degrees cost $25 with a washable insert pad and a cord length of just over 4ft.
These cute cows come ion a boy cow and girl cow variety, have a cord length of just over 4ft, cost $25 and we do not know how hot they get.
These bad boys cost $42 and come with their own small lithium battery for use when not near a computer, also come with an AC charger, and off/om switch, has a cord length of nearly 5.5ft and warm up to 111 degrees.
These suckers heat your feet at 120 degrees, cost $25, have a cable length of just under 4ft, and they have separate cord for each feet so those with a cold left foot and just plug in the left foot.
Early polls indicate that the cows will win. What do you say? I think the separate cords or battery backup are far more practical. Plus a boy cow is a BULL!! Give him horns!