Included Belt Extender: Posture Brace includes a belt extender which resolves size anxiety and suitable for people who are large-waist or slim. The velcro straps allow you to adjust how tight it forms around your waist and torso, making it much more flexible in achieving a custom fit to your bodyInnovative Design : Posture Corrector incorporates two adjustable straps across your chest and waist which avoid cutting into your underarms, and minimize risk of underarm chafing. In addition, there are two soft sponge shoulder pads are designed for reducing shoulder or armpit pressureStrong Support & More Effective: back posture corrector has 2 support bars on the back which ensure stability and provide robust support to improve your posture. It can take pressure off the key areas by aligning your posture properly, thus alleviating back, neck, shoulder and clavicle pain. Further, it trains your back and shoulder to make your chest out and shoulders back, boosting your confidenceUnisex, Choose S/M or L/XL: Brace Posture Corrector is unisex and comes in 2 sizes. S/M size fits a 23-35 inches waist, and L/XL size fits a 39-49 inches waist. By using the included belt extender, a strong and long-lasting velcro straps allow you to adjust your perfect sizeComfy and Breathable Fabric: Featuring breathable, strong, washable, and high-quality materials for long-lasting back support. Wearing it at the office and home to improve your posture when you are convenient. We recommend that you wear the posture corrector over your clothes for comfort