The internal and external shell is completely made of the best quality stainless steel. The exterior design features a striking combination of straight lines, massive yet elegant steel with the raw sauna rocks. The vapor version features an integrated vaporiser (3 - 4 kW to match the main heater power output). The heating elements are mounted on a rack and may be conveniently removed without the need to remove the rocks. Optimised ratio of radiated heat and convection due to the appropriate amount of stones.