5″ x 16″ size is designed to wrap around the neck, jaw, sinus or any small joint for convenient, portable moist heat therapy. Good2Go™ microwavable heat packs contain a patented filling, composed of non-allergenic crystals that do not leak, develop unpleasant odors or encourage the growth of mold and fungus. The non-organic crystals have a distinctive honey-combed surface to absorb up to 40% of their weight in atmospheric moisture that a couple of minutes in any microwave can quickly generate into a comforting moist heat vapor. A cozy deep-pile cover in a multi-ply design drives moist heat toward your body. Held snugly in place with a wide elastic and Velcro strap, heat is focused right where you need it most – for therapy that’s Good2Go™!