Hotronic E3 Custom Footwarmers 2013 1057
The Hotronic Power Plus m3 has three cells in each battery pack and is Hotronic's most powerful-yet-compact FootWarmer!  Easily installs in all types of footwear. Can be transferred quickly from one pair of footwear to another. Keeps you warm during skiing, snowboarding, hiking, fishing, and other general winter activities.