ThermaCell Heated Insoles Rechargeable keep your feet comfortably warm. They maintain a steady temperature inside your shoes or boots, keeping your feet around normal body temperature. That's different from disposable chemical foot-warming pads that get hot to the touch and can make your feet sweat. They are wirless, durable, light weight and affordable at a nickel an hour to use.
Items Included with Purchase: 2 Insoles equipped with integrated rechargeable Lithium-Ion Polymer batteries. 1 Remote control (battery included). 1 Global Charger, 1 drawstring travel bag, and 1 instruction booklet.
Sizes:S(3.5 to 5) M(5.5 to 7), L(7.5 to 9), XL(9.5 to 11), 2XL(11.5-13).
These things really work!, January 17, 2015 By Anonymous (Philadelphia, PA)
I spent 5 hrs on stand in 25 degree temp. You do need to make sure the shoes you intend to use them with will fit with moderately thick insoles. Actually, they work so well that if I had to I'd buy boots to fit the insoles.