I ended up having to order one for my wife since she was always wearing mine. Anyway, this hoodie is incredible. It works great during a working but also perfect for flying. It doesn't keep you warm per se, but it keeps you at a comfortable temperature as long as it's not below like 50F outside. You'll want to wear it every day.
I like how tight the sleeves and hood are. Best light hoodie to run in when it's cold out. Only complaint is that if the pocket zippers are ziped closed, they make the front of the hoodie feel a bit stiff. Easy solution- keep them unzipped.
Great fit. Most hoodies are too baggy and I feel like i'm frumple-stiltskin. This thing is not frumpy. I'm buying another.
p.s. I'm 6'3", 190 pounds, and the Medium fits me perfectly. Although a little tight on my climbing forearms, which I'm cool with.