@J-IV I just tried it with my ultra heavy flannel underneath and was surprised at how comfortable it was. The length of the flannel past the jacket is a little irritating but I don't know how other people feel about that, seems pretty common with Type III jackets for the length of a shirt to be visible past the hem. Hugging myself and spreading my arms is not uncomfortable at all. Thanks for the tip!

Thank you for the feedback @neph93 @Paul9221 !

Thanks @den1mhead !

Thoughts on the fit of my jacket? I like wearing this style more fitted/as a 'shirt'. I don't anticipate wearing much under it, just a t-shirt is fine with me and my climate… I see a lot of folks here layering with a button-up, but I think that my jacket is a little too fitted for layering. My fit seems to match the way that IH styles their Type III's on their site. I'm probably overthinking this, but any feedback? It's a 40, I'll likely pick up a 42 of another color way at some point, but I found the 42's sleeves to be a little longer than I like/am used to on a Type III.