The Tube heating pack by Thermal-Aid is designed to eliminate pain and swelling from the wrists, hands and neck. The tubes size is perfect on your desk at work or to put around your neck to relieve stress. The heating pack is 100% natural and safe. Warm it up in the microwave or freeze it in the freezer.Our Bio-Engineers and Doctors worked closely with milling experts using a unique patented process, which removes the embryo/germ tip cap and outer coat from each kernel of corn. This leaves the purest and cleanest portion of the corn product. This process hardens the specialized de-germinated corn, allowing it to hold temperatures evenly for long periods of time. It also eliminates mold, fungi and foul odors often associated with natural heating/cooling products.Uses for Thermal-Aid Treatment Packs include: Arthritis, back pain, muscle soreness, menstrual cramps, neck pain, carpal tunnel, headaches, and migraines, sprains/strains, sunburn, fever, stomach aches and flu symptoms, bug bites, lactation, babies with colic (under adult supervision), multiple sclerosis and growing pains. See enclosed instructions for details.Ingredients: Natural Cotton and a heating/cooling element composed of a specially engineered corn. No not use by individuals with corn allergies.