This back posture braces was made of soft but elastic material, which can provide great support without causing any additional discomfort. Featuring foam pads protect your skin against rubbing and keep the straps from digging into armpits, giving you effective posture correction without restricting movements. Back holder posture corrector keep you maintain proper position by pulling your shoulders back and aligning your spine back to natural form, Back support brace prevent you from slouching and hunching as well as gradually create the habit of good posture by training muscle, elevate your look and make you seem confident. You will feel the difference while you put on clavicle support brace, it can help get rid of pain caused by poor posture, improve scoliosis, thoracic posture to prevent further damage by holding back straight, provide instant pain relief and long lasting posture correction to care spine health. Back support brace designed with integrated structure make the waist velcro straps and shoulder straps connect together, a simple pull of the waist straps can adjust the tightness of the entire posture corrector from shoulder to waist, which make it easier to use. Built-in Two GLASS fiber strips can effectively support the spine and change bad habits. Size: S: Suitable waist: 50-80 cm, Suitable Bust: 60-90 cm M: Suitable waist: 60-90 cm, Suitable Bust: 70-100 cm L: Suitable waist: 70-100 cm, Suitable Bust: 80-110 cm XL: Suitable waist: 100-130 cm, Suitable Bust: 110-140 cm