Condition: New in Sealed Bag New microwavable Clay bead heating pad filling provides longer-lasting moist heat than our competitor's rice-filled wraps. Treats neck, shoulder, arm, leg, knee, back pain, and spinal stenosis WARNING: DO NOT OVERHEAT. Please carefully follow heating instructions below. Instructions are designed for 1200 Watt microwaves. As per instructions, if using higher wattage microwaves, heat at medium power level only.