Easy to use and adjustable Five sizes are available, suitable for women, men and children. Wear over clothing, then choose the correct size and adjust to a comfortable position to fit your body. Lightweight and breathable Ergonomic steel support bar provides strong back support. The breathable, lightweight fabric helps with heat and sweat. Suitable for many occasions including work, school, office, hiking and mountaineering. Improves posture and core support Helps align back and neck posture and can tighten the abdomen. If you sit all day with poor posture, you may feel tired and back pain. Wear this to train your posture and support overall spine health. Back pain relief and prevention Poor posture can cause neck or shoulder pain, back pain, osteoporosis and scoliosis, as well as rounded shoulders. Wear the full back posture corrector twice a day for 15 to 30 minutes to promote better posture. How to use and sizing guidance Ensure you are wearing it over clothing, select the correct size, and adjust to a comfortable fit. Use regularly for best results. Practical use scenarios - At a desk or classroom to maintain proper alignment during long study or work sessions - During outdoor activities such as hiking or mountaineering to stabilize the back - While traveling or commuting to prevent slouching and support posture