What's upgraded? Enhanced heat experience. Heating pad for neck and shoulders and back extend heating wire to 570-inch for superior coverage, twice as long as ordinary heating pads. Three heat settings (100 F~140 F) safely and comfortably relief your full back, neck, and shoulder joint/muscle pain. 22"x33" large size heating pad for back with wearable design - adjustable snap and strap, frees your hands and fits your body, hug your neck, shoulders, and back like a warm embrace. What is a weighted heating pad? Deeper Pain Relief. Ergonomically filled the shoulder and neck area of the heat wrap with 2.4 lb of glass microbeads, better than edge filling.