The Original Grabber Hand Warmer is perfect for skiers, hunters, fishermen, golfers, campers, or anyone who works or plays in the cold. Just open the outer package and remove the Warmer. Within minutes, you have a portable heat source that operates at an average temperature of 135 degrees F for seven hours or more. Easily fits in gloves and pockets. Grabber Heat Treat Hand Warmers are portable heat in the palm of your hand. Standard equipment for skiers, hunters, fishermen, golfers, campers and anyone working or playing out in the cold. Each Hand Warmer measures 2"" x 3½"". All HEAT TREAT Warmers are designed for one-time, disposable usage. But, if the heating time has not been completely used the process may be stopped by putting the Grabber warmers in an air tight container. Later they can be open again and the remaining heating time of the warmer may be used. When the Grabbers are unopened they have a shelf life of four years. Grabbers Heat Pack Hand and Foot Warmers are used in a wide variety of markets with the highest use in sporting goods particulary skiing and snowboarding. Additional markets GRABBER serves include: Shipping, Motion Pictures, Arthritis & Raynauds sufferers, and the medical industry to name a few. Uses extend beyond traditional uses. For example, many photographers use Grabbers to kep cameras warm so lenses dont fog. If used incorrectly, burns may occur.