Heat therapy is an effective form of pain management, especially for those with arthritis pain. Thermophore MaxHEAT Arthritis Pads are designed to generate moist heat to give long-lasting pain relief. Moist heat therapy is effective for treating pain, spasms and stiffness. The 14" x 27" pad covers a large area, offering relief to the entire back instead of focusing on only one specific spot. The heating pad features an on/off switch with a pause function as well as a 20-minute timer. Use the timer to receive 20 minutes of heat before the pad automatically turns off for your safety.