product Size: M, L (detailed size is shown in the table below)Color: blue, pinkMaterial: Velcro, mixed fiberPackage Contents: 1xChildren's Humpback Correction Belt1.Help Your Kid Build A Better Posture The back brace posture corrector is designed for kids and teenagers to prevent hunchback, kyphosis, lordosis, winged scapula, round shoulder ect establishing a good posture in adolescence helps your kid grow healthily and confidently2.Two Metal Splints Provide Effective Support 2 metal plates inside the fabric are contoured along the axis of kids upper back spinal it provides strong strength and stability to upper back and works as a reminder to develop good back posture and avoid myopia3.Elastic and Comfortable StrapsFeatures two strong elastic shoulder straps with protective shoulder pads and a adjustable lumbar belt, this back posture corrector provides comfortable protection for your kid4.Two Sizes Fit Most Kids Adjustable and elastic belts separately on the shoulder and waist make this back brace fit different body shape M fits 50-80cm in waist circumference, L fits 60-90cm in waist circumference5.Invisible Under Clothes This back brace can be worn invisibly under clothes which enables you wear it anywhere even in school no more hunching, slouching or rolling the shoulders forward