Point: The correction of posture mainly relies on the mechanics principle. The far-infrared health layer and magnetic massage stigma are also set in the cervical and lumbar vertebrae to promote circulation, eliminate shoulder pain, prevent spine deformation, and straighten the posture. Works by training your muscles and spine to return to their natural alignment. Our durable and comfortable design allows effective assistance while being comfortable to wear. The cushioned straps pull your shoulders back while our waist band supports the middle and lower back. Bad posture, left unchecked, can cause pain, lethargy, and even to nerve damage. Our back brace, coupled with physical therapy, aids for the of back pain, scoliosis, spondylolisthesis, and thoracic outlet syndrome. The importance of correct posture cannot be overstated. Always remembering to stand tall and straight, have shoulders back and down, with your chin tucked. Our brace will also assist your body's natural posture. Specifications: Main fabric composition: polyester fiber (polyester) Material: diving cloth, for magnet, nylon webbing Size: S M L XL 2XL Size      Waist Size     Flat Length     Strap Length                S        68-91cm            90cm            33-46cm            M        88-98cm            97cm            35-48cm L        92-105cm           103cm           39-51.5cm XL       105-121cm          120cm           42-55cm Package Included: 1 x Back Brace Posture Corrector 10 x Magnets