The Baja 631 provides pain relief and extra stability throughout the sacral, lumbar, and lower-thoracic spine. The bi-planar pulley system allows you to easily apply targeted compression along the vertebral column and the paraspinal muscles. As you engage the pulleys, the lumbar panel is drawn toward the spine and naturally conforms to your body. The Baja 631 is unique in its ability to easily integrate heat/cold therapy into the system. The gel pads can be heated in the microwave or cooled in the freezer and then inserted directly to the lumbar pad. * “Prospective Study of Lumbar Back Brace In an Interventional Pain Practice.” Rosenthal, Richard M.D. & Spencer, Shawn, BS. Practical Pain Management, (July/August 2011)