I bought a Windwall 2 a couple months ago so far it has done well in the cold Boston weather. It certainly blocks out the wind and provides a surprisingly good amount of warmth. You can easily wear it alone and be comfortable down to 45 degrees. It is thin enough to be worn a layer for colder temperatures. Overall I would recommend this jacket. Bear in mind that what the other reviews say about the sizing is correct, it is a little bit short and the sleeves are a little long. For a guy who is 5'6" and 150#, the medium fits great and I really don't mind that the sleeves are a bit long.