Reusable Magic Hand Warmer Heart

This unique hand warmer is referred to as "crystallization type". It is activated by flexing a small metal disk inside the hand warmer and stays warm for 15-25 minute. Can be used up to 300 times.To reuse, submerge in a pot of water and boil on stove for at least 15 minutes, or until filling is completely liquid and clear again. Complete instructions printed on item.