Iron powder, activated carbon, vermiculite, wood powder,salt, warter.
It is the ideal product to keep warm, relieve pain or detumescence. It gives out heat fast, and can last long time. It is very good for people who have below problems: arthritis, scapulohumeral periarthritis, low back pain, leg pain, rheumatism and similar problems.
It is also the best choice for you to keep warm in cold weather.