I am looking to purchase a US Wings Indy jacket. I had my eye on one of the Cooper Original style jackets, but I am glad I read the forums here first. Reading this thread, it sounds like the Cooper jackets have an insulation layer inside the jacket that make them very warm: https://www.indygear.com/cow/viewtopic.php?t=71744
I live in a warmer climate, and I don't want an extra insulation layer.
I would suggest emailing them and asking. US Wings seems to make running changes that take a while to show up online, so better safe than sorry, and know what you’re getting.
I emailed US Wings, and the Sarge replied, "Our Indy Jackets do not have the extra lining." So, I dunno. Maybe things have changed since that previous thread?