Jen's post, and the gilet, and some other long vests, have me considering a vest for the first time.

I am very temperature sensitive, and my extremities are always colder than my core. For this reason I have never understood warm vests. At least for me.

Does wearing a warm vest like this cause your entire body to warm up or will it make my core overheat while my arms are too cold? What do you think/what is your experience?