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.
