I wanted a slim fit so I could use them as a base layer for skiing.  These are however quite small, even when sized according to the size chart provided.  So order larger and still anticipate a slim fit.
Construction quality is good. Have worn all three and find them to wick sweat perfectly.
I'm not sure if it's a result of the very tight fit, but they feel like they exaggerate the cold when exposed to breeze.  When they have a later in top though this affect is gone and they keep you warm.
Just be wary of ordering slightly larger than size chart indicate.