Available exclusively from Hammacher Schlemmer, these are the sherpa-lined mittens with built-in heating elements that keep hands warm in the bitter cold. The mittens are powered by rechargeable batteries that supply three levels of heat at 131º F, 122º F, and 113º F, without being tethered to a cord or outlet. The sherpa-lined interiors provide plush comfort and help lock in the cozy warmth generated by the imperceptible heating elements. Charges via included USB cable and AC adapter; a full charge lasts four hours on low, three hours on medium, and two hours on high. 100% polyester. Imported. Gray. S/M or L/XL. (1 lb.)