PAIN RELIEF - YOII posture corrector is design to correct your posture by contributing three in one support to your shoulder, back and waist. By correcting your posture, YOII posture corrector effectively relieves neck, shoulder, back and lumbar pain that caused by incorrect posture such as hunchback, cross-legged, phubbers and sedentary lifestyle. | POSTURE CORRECTION - YOII back braces are inserted two highly elastic ABS support keels that make our back brace more stable and fitting on you. The widened waist belt provides 360°surround to protect your waist and relieve lumbar pressure. The cross design of straps on the back straighten your shoulders and align your spine. | ULTIMATE COMFORT - To ensure your wearing experience, YOII back straightener is made of breathable mesh fabric for outer layer and skin-friendly diving material for inner layer. The mesh hole design also make our back brace lighter and comfortable for inner wearing. YOII back brace is suitable for any scenario such as working, sitting, driving, and studying, etc. | REGAIN CONFIDENCE - A good posture not only prevents back pain, but also regains your confidence. A correct posture makes you look taller, has a better figure, and holds a better temperament. In workplace, having a good posture also make you look more reliable. | AVAILABLE IN MULTIPLE SIZES - Our posture corrector is available in a range of sizes, including small, medium, large, X-large and XX-large, catering to diverse body types. We strongly recommend that you use a tape to measure your waist circumference and purchase by follow size chart.