Incredibly light, but short
First the good: the size L is 5.7oz by my scales. It feels like nothing. Also, it packs into a tiny ball about the size of a baseball. I'm 175lbs and the L had enough space to layer but was more fitted than most larges. However, I am 6'6" and it was way too short. The bottom of the jacket hit right at my belly button. For an emergency jacket to carry when doing serious trekking, it would be great. However, my purpose was as a lightweight jacket to always carry when traveling. I wouldn't feel comfortable going out in "public" with a couple inches of mid/base layer showing. A real shame -- I'm now going to have to go with something that weighs twice as much, although at least I'll get a hood.