Thermacare Thermal Patches are designed to provide targeted, deep-penetrating heat therapy for muscle tension relief in the neck, shoulders, and upper back area. These single-use patches utilize air-activated heat cells that maintain a consistent, therapeutic temperature for several hours, promoting increased blood flow and muscle relaxation. Ideal for use after strenuous activity or during periods of sustained tension, these patches offer discreet, comfortable wear under clothing. They are formulated to deliver effective relief directly where it is needed most.