Gerbing 7V Wool Heated Socks

Heats the entire bottom of your foot Microwire heating elements deliver evenly distributed heat Moisture-wicking Wool Blend Fabric Special long cut pulls over your calf to fit any boot or shoe Touch-Button Temperature Control Includes: Two 7V Wool Heated Socks Two 7V 2,200 mAh Batteries 7V Dual Charger Estimated Heating Times: High (Red): 140 degree F - 3 Hours Medium (White): 120 degree F - 5 Hours Low (Blue): 100 degree F - 7 hours These socks get hot. Follow instructions and use them carefully.