Fully adjustable shoulder and back support brace. Wraps snug around your waist with straps supporting arms and shoulders. Two rods supporting and aligning the back patch. Sitting hunched over all day can cause fatigue and pain in the back muscles, especially sitting with the wrong posture. This pain can radiate all over your body and causing extreme discomfort and sore muscles. With this back posture support belt, you can relieve pain and look better sitting and standing. Very comfortable if worn over a one layer of clothing. Fast shipping, good value. Size: Medium.