It's a good solution to relieve muscle and rheumatic pains, joint pain, muscle stiffness and spasms. Use it to help manage the pain of muscular aches, arthritis, sports injuries, and swellings. These microwavable heat packs can also be used for headaches, neck and back pain, heat stress, menstrual discomfort, relaxation, comfort and warmth.
TO ACTIVATE
1. Flex metal disc back and forth inside the heat pack until crystals form.
2. Allow heat to spread through out the heater.
3. Massage heat pack until soft. Apply heat pack to desired area.
TO REUSE
4. Carefully place the hardened heat pack on a cloth in a pot of boiling water. Boil in rolling water for 10-15 minutes until all crystals are gone.
5. The heat pack is now ready for reuse.

HOW IT WORKS?
By flexing the metal disc, the friction caused acts as a catalyst that creates an exothermic reaction. The changing of the molecular structure from a liquid to a solid releases heat - this heat will remain for up to one hour (depending on size and insulation).
To activate, place the metal disc between your fingers and gently and slowly flex back and forth until the pack begins to turn white. Initially the pack will become rigid at activation. Massage the pack to maximize the heat as well as to soften the pack for better application.
The pack is now ready for use.
As the heat cools, the pack will gradually become rigid. To reset the pack, place the heat pack into a pot of boiling water and boil for 10-15 minutes or until the pack becomes completely liquefied. Please ensure the pack does not make contact with the bottom of the pot. To avoid damage, lay a saucer/plate of appropriate size or other suitable materials at the bottom.
The heat pack is now ready for reuse.
For use as a COLD PACK, store in a refrigerator for approximately 1 hour. DO NO FREEZE the pack.

NOTE: If the heat pack become solid or activates by itself after boiling it means the pack was not reset properly. Any residual salt crystals left in the pack will cause it to reactivate.
If this is the case, re-boil for a few additional minutes than previous for proper results.
NOTES:
1. To avoid any damage, please do not use sharp objects thorn or grind the pack. Do not press the heat pack hardly.
2. When the heat pack is hot, please do not flex metal disc again.
3. The heat pack is not edible, the children are forbidden to bite this heat pack.
CHARACTERISTICS:
This heat pack can get hot instantly. It is easily used because of portability. And it is environmental friendly.