Relieves Back Pain - The device supports and helps relieve thoracic and cervical upper back hunchback or kyphosis caused by poor sitting posture. A good natural posture is essential for correcting the lumbar lower back, helping to relieve pain and symptoms such as sciatica, lordosis and scoliosis. Breathable Material - Our lower back supporter is made of high-quality materials, which is comfortable and breathable. You can wear it at work, home or leisure activities. ^ Easy to Use - Based on ergonomic design, adjustable shoulder straps, suitable for people with waist circumferences of 26 to 49.5 inches (about 66 to 124.5 cm). Multiple sizes available: Small: 26-31.5", Medium: 31-35.5", Large: 35.5-39.5", XXL: 100.9-124.5". Just wear our back support posture corrector for 0.5-1 hour a day. ^ ADJUSTABLE - The posture corrector comes with fully adjustable straps to fit most sizes of men and women. Simply pull or loosen the Velcro straps to fit snugly around your body for the best results.