The carbon bed produced by heat pipe heating makes an ondol with a carbon plate to raise body temperature and sweat to discharge waste products.

In the carbon plate, far-infrared rays, called light of life, have an emissivity of over 90% even in the natural state.

Terahertz, which has good permeability, is released to deliver substances needed by the body and to decompose and discharge waste and fat accumulated in the body.

The wave energy from the carbon plate improves immunity, activates cells, helps blood circulation and helps health a lot.