SOCK LINER HEAT 7V L/XL

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