I ordered up a size as one of my track jackets is smaller than another in the same size. I really would not have needed to. This jacket is roomy , stretchy, and very warm. I thought the picture made this look like a thin fleece. It is actually heavy. I will be wearing this as a coat instead of a coverup at work. The zipper works well, it appears to be made of good quality. I have not washed it yet to say how goes. I am happy with the jacket, just wished I hadn’t sized up!