Designed to provide trunk stability to fatigued muscles which can lead to acute and chronic low back pain, the Horizon™ 631 LSO provides a therapeutic level of compression for patients recovering from surgery or injury. Its low profile design can be comfortably worn underneath clothing. One size adjustable, the Horizon 631 LSO comfortably fits waist sizes ranging from 24-50 inches, and up to 70 inches with the extension panels. To further support patient recovery, Horizon braces can be stepped down to the Horizon PRO for treatment of recurring ailments. If you're looking for a light weight structured support system the Horizon may be exactly what you need to relieve the pain and pressure. This brace is ready to wear and get you back to living. Please see all pictures included as they are of the item being offered. Feel free to ask any other questions you may have.