First I received the white and black crew pack very quickly, I ordered XS but one was M. I immediately submitted for an exchange in size and that arrived quickly as well, even though I just sent the M back - now that’s superb customer service!Next, the XS fit was nice and snug, just right around the chest and tighter around the belly. Did improve my profile and smoothed out the bumps, so I looked sleeker when wearing a form fitting turtleneck or slim shirt. Also I’m warmer wearing it like a therSee full review