Gerbing 7V Battery Heated Sock Liner - GER-SKLN-7V-XXL

Heats both the top and bottom of your foot
Microwire heating elements deliver evenly distributed heat
Lifetime warranty on the heating elements
Moisture-wicking Fabric
Special long cut pulls over your calf to fit any boot or shoe
Touch-Button Temperature Control
Estimated Heating Times:
High (Red): 140F - 3 Hours
Medium (White): 120F - 5 Hours
Low (Blue): 100F 7 - Hours
Includes:
Two 7V Sock Liners
Two 7V 2,200 mAh Batteries
7V Dual Charger