Thanks to everyone for your comments. Based on what I'm reading here, I'm going to keep the jacket. The zipper on the "wrong" side seems to be typical, and the sizing is form-fitting, but not too snug. (As long as I don't gain back the lbs I've recently lost, it should be OK.)
But now I'm wondering what you recommend (specifically with a link, if possible) I wear underneath, (between the compression shirt and jacket) instead of the cotton turtleneck?
Thanks again!
Thanks!