These Thermacare Back Support Strips are designed to provide targeted heat therapy relief for muscle soreness and tension in the back area. Utilizing patented technology, the strips conform to your body shape to deliver deep, penetrating warmth that helps to relax tight muscles, increase flexibility, and ease discomfort associated with long periods of standing or light physical activity. Apply the strips directly to the skin over the painful area. The heat activates upon exposure to air, providing hours of continuous relief that supports your recovery and mobility.