Ralph Lauren hunting vest(?)

EUC (seems unworn honestly, but I can’t attest to that) RL reversible hunting vest. No tags, no size, but awesome piece. Wish it fit me as I’d keep it, and haven’t seen one like it. But alas, I’m sporting a full dad bod now. All snaps/zippers/buttons are in working order. Measurement’s in pics, but ask if you have any questions. If you know anything about this piece also, feel free to share in the comments. Medium size is a guess. Again, please see measurements.