Fully Adjustable Back Support Brace Belt Posture Corrector For Pain Relief Posture corrector plus size can improve lousy posture, mainly acting on the neck, shoulders, back, chest. It opens the shoulders, prevents scoliosis, and corrects bad posture by pulling the upper body bones and muscles back to their normal position with external support. After adjusting posture correctly, you can feel the lower back pain relief and the relief of the pain in critical areas so that you can keep away from slouching and hunching and breathe more smoothly. The exterior of the smart posture brace exterior is made of breathable, soft, ultra-lightweight, sturdy, and washable stretch fabric; Velcro helps you adjust the length freely.