Unlock the full potential of your sauna with our Oval Volcanic Sauna Rocks. Naturally heat-resistant and shaped for performance, these smooth, oval stones retain and release heat evenly to deliver deep, consistent warmth and steam. Their porous volcanic material ensures rich steam production, while their shape promotes airflow and efficient stacking inside your heater. Technical Specs Material: Volcanic Stone Shape: Oval Use: For Electric and Wood-burning Saunas