Thanks Giles, I'm located in NYC and it occasionally dips into the low teens (thats in F, so -12..-15C )..would you say this jacket is warm enough to wear over only a tshirt in such temperatures?
it is not possible to stay warm with this jacket and a t shirt, from my experience with the ihj-39.
i live in philadelphia and have experienced such sub zero coldest winter days a few times in the past few years, i think might be okay with another long sleeve sweatshirt but not a t shirt under the jacket alone, the ihj-39 is warmer than the real mccoy n1 deck jacket, and seems to perform better when windy.