Thermotex Far Infrared Heating KneeThe Knee System utilizes two patented far infrared inserts. After just 20 minutes of use, the soothing infrared wavelengths penetrate up to 2. 36 inches into the applied area. This results in an increase in blood flow, which provides nutrients, oxygen and proteins to the area to relieve pain and inflammation. These enhanced natural properties are what the body requires to heal. Provides relief from: Muscle pain and stiffness Joint pain associated with