Green Athletic jacket

Athletic jacket from Costco! Looks like it’s from lulu lemon and it’s nice quality! Super pretty bright green as I tried to depict in the last pic! There is also a black stain on the back which I tried to highlight, I’m going to try to clean it off, but it’s not that noticeable! I don’t know how it’s there because I never wore this. size: small (I am typically medium)