Best utility wear
I own 2 of the Nano puff's. Pound for Pound its the best jacket out there.
Im 6'3" and 220 lbs-the Large fits me fine, even the sleeve length is generous. As stated on previous posts, its cut short on the waits to allow a harness.
My real use for this is to add as a layer to my shell. I have always preferred to buy a good solid shell that gives 3-4 season use and add a layer of insulation for Winter. Buying a sealed insulted jacket doesn't make sense as I only get to use it in Winter. In this regards the Nano Puff works great as it fits perfectly under my shell and can be stuffed into a pocket if needed.