MacGivorwrote a review of Patagonia Nano Puff Pullover Insulated Jacket - Men's on February 21, 2016
Fit: Runs small
I purchased this as a layering piece for skiing to go under my 3 layer shell. Its has been PERFECT. The deep front zip works great to vent a little if necessary. It adds the insulation that I need to stay comfortable in my shell. I feel like it might run bit on the small size. I usually wear small button downs from Patagonia but I am glad i purchased a medium as it seems to fit perfect, a tiny bit tight in a spot or two. The small would be too small for sure.