i tried on a M, I usually use a large and was hoping i could fit into a Med since they say it is oversized for a belay jacket. It was pretty much a true medium size and did not fit. It also seemed heavier than it should. I realized it has 200 grams of insl, almost twice whats in my redpoint optimus (better primloft in the NF product). But for never leaving the store, I wasnt impressed. Not very fashionable for intown, and you can buy an amazing down piece for the same price at half the wieght. So for me this piece fell flat as either a technical jacket or a in town jacket. There are too many better pieces out there.