I retired from the U.S. Army in 1990. Grew up in Florida, and now live in New Mexico...
I still have my "Olive Drab M-65 Field Jacket's" one with a liner and one without a liner. Like this:
Ultra Force M-65 Field Jacket Olive Drab: Amazon.com: Clothing Had two tours (24 months) in Korea and 40 months in Germany.
I have been to Utah, not sure what you need in the Winter. Technology has changed. My wife bought me some state of the art thermal underware, which works better that my Army issue ones.
Good luck to you.