Danwrote a review of MontBell Ultralight Down Pant - Men's on March 1, 2014
Familiarity: I've put it through the wringer
Fit: True to size
These are the perfect complement to an ultralight sleeping system. I carry these when temperatures will dip just below freezing to help extend my quilt at night, but also for wearing around camp or out shooting photos. Just be careful if you sit down on them, they are not particularly durable.
Fit is roomy enough to be able to pull them over a base layer or even hiking pants, but still trim enough to be efficient.