Andrew L.wrote a review of Patagonia Nano Puff Pant - Men's on December 8, 2019
Familiarity: I've used it several times
Fit: True to size
I use these alpine climbing. Combined with a light sleeping bag you can make a bivy manageable despite lousy weather.
I bought them big enough to go over my soft shell pants and pull them on as soon as possible at the bivy site.
They make a huge difference. They stuff down to nothing so that’s also a big plus.