if you want a tight fitted long john that isn't saggy on the armpit area, this is it.
the small size is small, good fit for skinny person, not big and saggy like alot of other brand out there.
its kinda warm too, the fabric is a bit fuzzy feeling though, and its a mix with polyester, not my favorite material, which is why its losing 1 star, but it is what its described.
I like the open neck area, not visible from the outside when worn as underlayer.