It's definitely warm, thinner than I thought though. I had it with a hoodie underneath and was warm in sub-freezing -- I don't know about precisely at 14 degrees though... It's a very nice piece, looks great too. Retail is like 900 right? I don't think it's worth that, but I didn't pay anywhere close to that and I'm very pleased with it.
If yours is a medium in black...you should sell it to me...trust me....you don't like it as much as you think you do.