mod or anti fungal agent of the type well known in the art if desired in order to further inhibit such formations in terms of heat transfer the cover 201 is advantageously configured to per with significant and largely unimpeded heat transfer from the therapy medium to the exterior of the cover 201 and hence the subject heat can be generated within the medium through any number of processes including conduction convection or radiation however the preferred method of heating for the illustrated embodiment is the conventional magnetron equipped microwave oven as is well known in the radio frequency arts the wavelength of the rf energy emitted by the magnetron is tuned to excite sympathetic molecular vibrations within the medium being heated thereby inducing rapid localized heating within a short period of time the wavelength of the average microwave corresponding roughly to 2 4 ghz frequency by c u03bbf is tuned to excite water molecules h 2 o after a few minutes of heating depending on size and desired temperature the therapy element 104 is elevated to the desired thermal energy content and may be applied to the user the therapy element can also be heated in situ within the belt 100 if desired for ease of use and handling rather than separate heating and subsequent insertion in one embodiment the therapy element comprises a substantially u201c breathable u201d or.