I have purchased this jacket as it looks nice and seemed (while I was in the store) to be quite warm thanks to down filling. Unfortunately, I was wrong here. This jacket feels a bit like a t-shirt. It does provide fairly good insulation around the center of the body: upper/lower back and chest stay warm in winter conditions. However, sleeves feel like they are missing the volume of down. there is just not enough insulation in sleeves to keep arms and elbows warm hence why this jacket feels a little bit like a t-shirt. I have to put something warm under this jacket every time I go outside but... while my arms and elbows feel warm, my chest and back are simply boiling. serious design flaw is perhaps a very good description of otherwise good jacket which looks great.