what is the lowest tempertature can you...
what is the lowest tempertature can you wear this jacket and still feel warm at?
That is a very tough question. This jacket has 80g recycled poly insulation, so it will be warmer than a normal shell. If it is super, super cold outside (-25f) I'd really bundle up under this jacket. If it is a moderate day, you could just wear a first layer piece and be just fine.