"Army scientists testing how to keep warm without gloves"
Forearm warmers, which are intended to simulate the warming effects of exercise, required about 41 watts of electricity — about what is required to power a low-light house lamp. By using a warmer wrapped around a test subject’s forearm, researchers were able to raise the finger skin temperature from 50 degrees to 55 degrees. While small, that slight bump added 50 percent more dexterity.
The goal, Castellani said, is to reach about 60 degrees for finger skin temperature.