Is it necessary to add moisture to the Thermophore Pack?
No, you add nothing. Simply place the Thermophore pack on the affected body area, depress the switch, and within moments, intense moist heat will penetrate tissues to relieve pain. In some regions of extremely low humidity, it may be necessary to store the Thermophore in a humidified room. In particularly dry situations, a stripe cover has been developed to provide moisture directly to the flannel cover.