Not Sure
Many of my co-workers have back pain because of the nature of our work, so I bought the belt to prevent it. The belt looks solid and well-made. I am not quite sure if it really helps me to prevent the back pain but it definitely does not help me regarding correcting the posture. Also, it is a bit uncomfortable to wear. I guess it may help if someone has back pain. For the quality of the belt, it deseves four stars rating.
Rating: 4 stars