Mueller® Adjustable Back and Abdominal support has easy one handed adjustments to help flatten your stomach while straightening your back. Unique cinching pull-strap for easy one-handed tightening for abdominal compression and lumbar support. Smooth and comfortable rigid support panels provide support. Helps promote improved posture. Extends from L-1 to below L-5 vertebra. One size fits most. Measures 32–51" / 82.2–129.5 cm.