I ordered these because I was looking for something comfortable and warm with the convenience of a fly. At first I was concerned because the gusseted crotch seemed uncomfortable; the placement of the seams was different than what I am used to. In actual use however, they were never an issue and the garment performed as expected. The sizing is generous and shrinkage is minimal, so if you are in between sizes you may wish to opt for the lesser of the two. The fabric is very comfortable next to the skin and both moisture transport and overall warmth were excellent.

Marmot long undwear is the best stuff I own. I always reach for Marmot base layers first. While Patagonia makes great thermal underwear too, Marmot's wicks away moisture better and feels better against my skin.