Took my bush jacket out for the first test run yesterday. It has some interesting design features that are true to the “hunting jacket” genre.
Sleeves are extra long, which allows you to pull your hand entirely inside the sleeve to keep warm if you aren’t wearing gloves.
The fit allows room for extensive layering underneath if you need it in very cold weather. You can also button the collar fastener and pop the collar to keep the wind off your neck. If you plan to wear it with just one thin layer underneath you might want to size down from your normal IH size.
With a couple warm layers underneath it should be able to handle single digit Fahrenheit temps, or with just a light shirt it could be worn into the 60s, as long as you aren’t moving around too much.