The Thera-Med cold back pad alleviates pain associated with the back and neck. It is designed with two-sided, dual-temp technology and remains flexible when frozen so it can be applied directly to your body. The soft blue side offers gentle cool therapy and the white side provides maximum strength cold therapy. Easy-to-use, simply chill in the freezer and apply to relieve pain and swelling. A natural substitute to over the counter drug treatments. Doctor recommended cold therapy.