Pack of 10 medium 20g flameless heating packs, which are activated by adding water, or almost any other liquid. They are non-toxic & eco-friendly, odorless, and water-insoluble. The remaining quicklime powder of the heating pack is ecologically friendly. The byproduct is a powderless toxic than salt, sand, and mud.
Within minutes, the heat packs get to just over 204˚F for up to 30 minutes and stay warm for another 30 minutes. After use, the heating packs can be disposed of in the trash.