3 multi-zone self-heating patches

Thermacare Multi-Zone Self-Heating Patches provide effective, targeted relief of muscle and joint pain associated with muscle strain, muscle aches or osteoarthritis. They can be placed in the arm, middle of the back, or in the calf. They have multiple cells that contain air-thermoactive agents, such as iron. As soon as it is applied to the skin, it diffuses constant heat for 8 hours which relaxes the muscles and thus relieves pain.