Size - Small, Circumference - 56-71 cm This contoured Light Back Support is made of high quality vented elastic strapping material and effective vented tension side-pulls to provide superior support. The back support provides intra-abdominal pressure against spinal instability; plastic splints provide extra support; and rhomboid tension side-pulls flatten the lordosis. Helpful to people who suffer from: Lumbago Spondylosis Facet joint dysfunction Mild spondylolisthesis, spondylolysis Inter-vertebral disc herniation (HIVD) After lumbar laminectomy or discectomy Postural hypotension due to cervical spinal cord injury Ligamentous disorders or back muscle strain