reusable instant hand warmer that produces substantial heat. This reusable, instant heat pack is designed to replace your instant hand warmer that you normally use and throw away. This reusable hand warmer can also be used as a "hot rock" replacement in massage therapy. This instant hot pack will fit the Green, RED or BLUE ect insulated hand warmer pouch which will enhance and extend the heat generated. This pack will also fit our specially designed mitten that will keep your fingers nice and warm. Check out our mitten that acts like a glove! We have many shapes: heart,circle,rectangle,square,egg ect. Please tell us what your requirement is, we can make it especially for you.