Moist heat therapy using moist heat packs is a great way to soothe away muscle aches and pains. If you heat up your moist heat pack in a moist heat pack unit, it is important to handle your heat packs with tongs to avoid injury. These tongs can aid in removing heat packs from heating units and place them from the heating unit onto a heat pack cover. That way the moist heat pack can be safely applied to the patient.