Our back posture corrector, adopting breathable and soft neoprene fabric materials, ergonomic tailor-process and precise stitches, can effectively improve posture through pull, stretch and support your upper body aligning with upper back, spine and lumbar to limit forward shoulder movements and restrict slouch and bending of the spine, and meantime, relieve pains of back and shoulder caused by long sitting for work or study or injury. Additionally, it owns 7 sizes (S/M/L/XL/XXL/3XL/4XL) to fit male, female, adults and teenagers.