Warm up body and relieve pain.
Help facilitate blood circulation.
Suitable to use on muscles, necks, arms, shoulder.

Easy-to-use:
1) Bend the metal plate inside the heat pack, the liquid will become crystal and hot immediately.
2) Knead the pack to make it soft.
3) If the pack becomes hard, just put it into boiling water. After boiling 5 mins, the crystal will become liquid again. When the pack cools down, it is ready to use again.

Safe and Reusable.