The Fieldsheer® 7.4-volt heated hand warmer is the perfect alternative to gloves when keeping your hands warm and shielded from the elements. Powered by Mobile Warming® heating technology that surround your hands for the best heat experience. The universal hand warmer has a water resistant shell and elastic pocket entry that allows for a snug, comfortable fit around your wrists while keeping the air out. With a large pocket with waterproof zipper, you can keep all your gear safe. One size fits most.