| 摘要 |
The present invention addresses the problem of providing a heating appliance that becomes hot during use and remains in a hot state for a long period of time. The present invention is a heating appliance (1) including a heating agent (5) and a packaging material enclosing the heating agent (5), wherein the packaging material is a flat bag-shaped material comprising a first surface and a second surface, and each of the first surface and second surface has a vent region (2) and an air-impermeable region (3). |
