This is a CWU36P manufactured in 1980. The size is S, but because it's an American size, it fits me perfectly even when wearing a sweatshirt underneath, and I usually wear a Japanese brand size L. Also, it has action pleats, making it very easy to move in. The zipper is faulty. You may need to have it repaired, or it's fine if you wear it without zipping it up. There is sun fading on the shoulders. The ribbing is in pretty good condition. This item is from 45 years ago, so please understand that returns are not accepted.