Hand Warmer:
1. Bend the metal plate, the liquid will become crystal and heat automatically. For next using, only need to put it in a boiler full of water with a cloth and heat until the crystal become into liquid (about five minutes).
2. Becomes hot instantly, unlimited use.
3. Non-toxic, Non-caustic.
TO USE:
1. Flex metal disc back and forth till liquid change into crystals.
2. Knead pack to soften. (If the temperature is too high, wrap a thin towel around the heat pack before using. )
TO PREPARE FOR NEXT USE:
1. Put the hardened heat pack into boiling water. Continue boiling for approximately 5 minutes or until the crystals are completely liquid.
2. When the pack cools down, it is ready to be used again