SOCK LINER HEAT 7V 2X/3X

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 7V Dual Charger Includes: Two 7V Sock Liners Two 7V 2,200 mAh Batteries