Abstract: A thermal device for maintaining the temperature of body extremities is provided. The device includes a pocket adapted to receive a heating element and a strap attached to the pocket such that the device is adapted to encircle and be secured around a portion of the human body. The pocket has a tri-fold configuration formed from a rear panel, a front panel, and an intermediate panel positioned atop one another, the intermediate panel being positioned between the front panel and the rear panel. Each of the three panels is connected along their respective vertical side edges. The first horizontal edges of the front panel and the rear panel are fixedly attached forming a first open space between the front panel and the intermediate panel and the second horizontal edges of the rear panel and the intermediate panel are fixedly attached forming a second open space therebetween.