Thera-Med Professional Dual Moist-Dry Heating Pad offers dual mode (moist/dry) heat options for optimal therapy. It has four heat settings. The moist heat option provides deep penetrating relief from sore, stiff muscles, while the dry option provides a comforting warm treatment. The unique pad design delivers a consistent therapeutic heat in the recommended range and eliminates any spikes to maintain an even comfortable level at all times. The auto shut-off feature turns the pad off after 40 minutes of use. The removable ultra-soft cover is machine washable.