Technology marches on, and now even heated USB slippers have gone "dual core." Thanko now gives you an individual control for each foot with its latest USB Warmer Slippers ($33) with a two-step temperature control switch for each slipper, letting you crank up the heat on one foot while leaving your other foot lukewarm.
USB heated slippers have come a long way since their inception way back in 2005, and now there are advanced models that cover your ankles, and even have a very special bear attachment. Even so, never were they as technologically advanced as this. But jeez, who wants to be tethered to a PC like this? It must feel like a ball and chain.