Scott O.wrote a review of Patagonia Nano Puff Bivy Insulated Pullover - Men's on July 26, 2018
Familiarity: I've put it through the wringer
Fit: True to size
This thing goes everywhere with me -- it crushes down to almost nothing (and can conveniently be used as a pillow when packed into its zipper pocket) and breathes enough to be useful in a pretty wide range of temperatures. I've used it mountaineering, backpacking, skiing, hiking and in the cold conference room at work. The fit seems true to size and is incredibly comfortable. This might actually be my favorite piece of clothing.