NEVER SPOILS OR MOLDS - Unlike rice or corn heating pads, these pads will never spoil, mold, or smell. The beads we put in the bag are odor free, toxic free, unscented, and reusable with no additives. COMFORT AND SOOTHING - Will ease pain and increase blood flow to affected areas. It is very soft to the skin. The outside is made of a micro fleece that feels like a pillow. Moist heat treatment is perhaps the most relaxing of all the physical therapy modalities. RELIEVE PAIN IN PROBLEM AREAS - The most common uses are for physical neck pain, shoulder pain, menstrual cramps, urinary tract infections, earaches, arthritis in the hands and knees. Can soothe and relax sore muscles, joints and ligaments.