Check out the Kuiu Chugach TR.
Discussion
Or I bet you could have Nomar add pit zippers to your rain jacket. They are pretty good at that kind of thing.
You know what that’s a great thought. They’re pretty heavy duty as far as gear goes, wonder if they have anything light enough for this jacket 😂
I do have one of the chugach jackets from kuiu, love it. Looking for even lighter/ windbreaker type that packs up even smaller into my backpack