These Sauna Stones provide a good and soft heat, with the split face storing a lot of heat and aiding water evaporation, Per 20kg pack.
The angular split face of these sauna stones allows for loose placement of the stones, which is the most important requirement especially in an electric heater where it is important to get the heat to be conveyed to the sauna room between the hot stones and heating elements. The heating elements will last much longer if there is good air circulation in the placement of the stones.
Light (ceramic), soft (soapstone), and smooth (rounded) sauna stones do not produce the desired results and they may cause problems in electric heaters in particular. These types should not be used.