XL Size = Waist Size 76cm - 137cm (30" - 46") Adjustable Velcro System For wide coverage lower & mid back support Four strong flexible medical springs for maximum support Unique front abdominal overstrap to counter front postural pressure Arthritis, Back pain, Back strain, Compressed disc, Facet pain syndrome, Herniated disc, Lower back pain, Lumbosacral strain, Slipped disc, Stress fracture