Infrared radiation is safest natural heat that penetrates 40m/m deep into the skin, with the highest heat effetiveness among all the sun rays.

  Infrared radiation is composed of electronic waves that induce a free flow of perspiration by heating the body directly, wihtout having to heat the air in between.

With the infrared radiation incorporated, Sunghospa penetrates into the muscles right beneath the joints. The result is a infrared radiation stimulates the molecules of human cell thereby accelerating cell motion, which in turn would heat up the body and exude perspiration. This is the secret behind Sunghospa.