You're looking at this because something's up with your shoulder. For it to do anything, it has to be a very snug fit. Now, I don't have a better idea, but you put this on/off EXACTLY like you would a tight t-shirt, and...see where I'm going with this? Right. It was SO painful to get it on/off. And weirdly the right sleeve is demonstrably tighter and pinches and has rubbed raw this underside of my arm at the end of the sleeve.
I bought two of these shirts hoping it would help support my shoulder. But it’s made so tight that someone with a bad shoulder can hardly put it on, and taking it off was a nightmare and painful!