Just figured I would revive this thread. Can't believe I hadn't found these vests/jackets sooner!
I read that the women's medium vest–in the compact variety–is only 72g! If the men's is even close to that I'll be super stoked. I never zip my jackets up all the way, and supposedly the compact is ~2" shorter to allow it to fit under layers better. Perfect for me. I went with the medium. I'm 6'2", ~175ish, medium shirts are usually pretty form fitting. Wanted to get this fairly form fitting as well.
I ordered one yesterday, it shipped today. I got it on sale for 39 bucks and 7 dollars shipping, looks like it went back up to 49, but when compared to others in the category its still a steal.
Should be getting my hands on it next Thursday, so I'll know more of the quality/warmth. I wasn't looking for something too warm, I overhead a lot. Pretty sure this is going to be exactly what I needed.