Aspen Horizon 637 LSO Back BraceAspen Horizon 637 LSO Advanced Lumbar Support with Lateral Stabilization The Aspen Horizon 637 LSO provides exceptional postoperative and injury recovery support for patients who need increased lateral stability and effective pain relief. Designed with moveable rigid side panels, it delivers a higher level of control for the lumbar and lower thoracic spine while maintaining comfort for all day wear. With the addition of moveable, rigid side panels,