It is a winter weather day here today and we are seriously addicted to our Maine Warmers. They are THE answer to cold hands or shoulders and certainly the best solution for a sore back or a stiff elbow. We do use ours in the summer months to cool off or to treat an unexpected injury. Of course,  it is an easy thing to keep one in the freezer and find relief in a moment. Thank you for this fine quality product. Most sincerely, ~K. R.  Williamsburg, Virginia 1-27-15