Reviewed by vereroo from Vermont on Thursday, January 23, 2014
These pants were made for Lands End. I'm 5'6", 29" waist, 39" hip, and I ordered the small. They fit nicely as long underwear, and sit very smoothly under other pants.
You could also wear them as pj's or for exercise. You could even pass them off as leggings, though they're a bit thin and shiny for that, so you'd have to want that look. (at 40, I don't particularly) They have a little gusset in the crotch.
They're impressively warm. The polyester weave is something clever that lets them breathe. I generally hate wearing polyester, but haven't had any problems with these.
The seams are strong and they generally seem well made.