Helps wearer maintain correct posture - reduces muscle strain on lower section of the spine to protect against fatigue strain and other back-related conditions and injuries. The Duo-Adjustable Back Support is 9 wide with four vertical metal stays for optimal support and maximum comfort in daily use. Back pocket for optional removable moldable thermoplastic insert. Provides medium support and increased stability for the lower back. Two additional side pulls for precise support and tension adjustment to the desired level. Very comfortable to wear and unnoticeable under clothes. Size: Universal. Recommended for those who: Suffer from osteochondrosis or lumbago. Have ever experienced lower back pain. Have undergone surgery on the lower section of the spine. Lift or move heavy objects. Spend long hours driving standing or sitting without much movement.