Great undershirt - perfect weight, wonderful feel against the skin, durable.  It's a quality piece and I can tell I'm going to have this garment for a long time.  I wear a woman's size 0 or 2, so I ordered the XS, and unfortunately, it runs way large.  As stated, the size XS will fit a size 6 woman perfectly, but since when is a size 6 an XS? I found the sizing to be a bit misleading.