soojemasid
Soojemasid is a term of Estonian origin that translates to "warmers" or "heaters." In its most common usage, it refers to small, disposable chemical packets designed to provide localized heat. These warmers typically contain iron powder, salt, activated carbon, and vermiculite. When exposed to air, the iron powder undergoes oxidation, a process that releases heat.
These heat packs are widely used for personal comfort in cold weather, such as during outdoor activities
The activation of soojemasid is a simple process, usually involving shaking the packet to expose its contents