If they're using Peltier devices it's probably going to require a largeish power supply, and some kind of heat dissipating/gathering device. One possible way to

If they're using Peltier devices it's probably going to require a largeish power supply, and some kind of heat dissipating/gathering device. One possible way to get around this for something like a suit jacket might be to move it from the wrist to the upper back, and to sew thin copper wires into the jacket. Also you could probably get away with having a few thin LiPoly cells placed in pockets around the jacket. Couple it all with an inductive charging coat hanger, and you've got a product worthy of SkyMall!