Give cold feet the boot with the ActionHeat Cotton 3.7V Rechargeable Heated Socks 2.0 with Remote. These ActionHeat socks feature a built-in heating system that uses removable 3.7V rechargeable batteries (included) that sit inside dedicated pockets to provide up to 7 hours of warmth on a single charge. A convenient remote control lets you cycle through 3 heat settings, warming to 100F on low, 120F on medium, and 140F on high. Boasting a comfy 70% cotton/30% spandex construction, these socks use ultra-fine carbon fiber heating panels on top of the toes to keep your feet nice and toasty. At the end of the day, simply plug them in with the included dual battery-charger kit. The ActionHeat Cotton 3.7V Rechargeable Heated Socks 2.0 are machine washable (without the batteries). Imported.Manufacturer model #: AH-SK-3V-C. 70% cotton/30% spandex construction Integrated heating system provides up to 7 hours of warmth 3 settings 100F on low, 120F on medium, and 140F on high Included rechargeable 3.7V batteries with dedicated pockets Remote control lets you easily control heat output Includes a charging kit