This is another excellent piece of undergear from Patagonia. This undershirt is a slim fit, so if you want a loose fitting shirt, this isn't for you. The fabric is light and warm, almost like a second skin. The shirt is sexy, too. I am 6'3" and 170lbs. I usually get a large, but since Pantagonia products tend to run large, I got the medium and it fits great--even the length of the sleeves are long enough. After two washings, there as not been any shrinkage. Even though it is an undershirt, I enjoy wearing it on its own cause it is jut that cool.
im 6'2, 190lbs and i normally wear a large size tshrt. i thought this shirt would be tight just like the pictures on patagonias website but it wasnt. it was al little loose. which is good becaue i didnt want this thing up close since it was so itchy.the arms were tighter than the body and constanly itched me. im returning it and trying out other merino options
This thing feels great against your skin. I think it is softer and more comfortable than most of the more exspensive ibex baselayers. It's wicking capabilities seem equivalent to most poly pro pieces except it REFUSES TO SMELL!!!!! This shirt totally sold me on merino, you won't be disappointed.