Really works!

I was only able to wear this for a short time as it wasn't large enough even at it's most expanded size to fit my arms. If you are very muscular at all then this is not going to work for you. But I have a chronically knotted muscle in my back and felt that this helped relieve the pain by correcting my posture. I only wish this was a few inches larger so that it fit more comfortably. This device does work and is simple to use. The material is durable and of good quality. It's nicely padded and soft. The strap was large enough around my chest, I just think the arm straps need more adjustment room or maybe make more sizes. Otherwise it's a great product!