Very happy with this undershirt. I bought the x-small/small in the beige color.  I normally wear a small and this fit perfect. Material feels is very soft & silky, nothing clings to it, no tags to irritate skin. The scoop neck is adjustable. If you want it a bit lower, the stretch lets you pull it down a bit. There is plenty of room to tuck into pants. It reminds me of a long sleeve ballet leotard as far as the size of the scoop neck. You can see the shoulder seems & neck seam a bit through some of my very thin tops, but I don't care. I rather be warm. The sleeve is about 1 inch above my wrist, but it keeps the garment from pocking out from under your top. No compression from this, which I like. Will buy another color for sure.