The Summit 631 LSO limits motion and provides effective trunk support with targeted compression. Utilizing innovative materials and an ergonomic design, the Summit 631 LSO contours comfortably to the vast majority of patient anatomies without compromising support. Aspen's SlickTrack Tightening System features an independent upper and lower tightening mechanism, providing direct compression where needed. Anterior panels at each end of the brace overlap to provide added midline support. Featuring Aspen's innovative FlexTabs, these panels disperse pressure and naturally conform to each patient's anatomy to help increase comfort. All structural components are easily removed and can be heat molded, bent or trimmed to further customize the brace to accommodate various patient conditions. Tri band technology system and integrated vertical stays provide stability and maintain structural integrity to help ensure effective compression and flexibility. The unique sizing mechanism allows for quick and easy sizing adjustments, without the use of tools. The Summit 631 LSO is available in a one-size adjustable and in the original sized versions: Adjustable (26 to 60 inches), Small (26 to 34 inches), Medium (33 to 42 inches), Large (41 to 51 inches), X-Large (50 to 60 inches).