Love this shirt. At 6' and 170lbs, the medium fits perfectly. I have long arms and tend to have problems with sleeves, but this has generous sleeves, and for someone with average/shorter arms, they allow for bunching for a little more loft if you're using as a base layer. Body is plenty long, I wear untucked but there's plenty of length to tuck and not pull out when moving, bending or reaching. The neck has a little bit of wiggle room when zipped, so no worries if you're claustrophobic.

Going to have to pick up some more SmartWool stuff!

This is a great shirt. The texture is a little different (think rougher, but not itchier) from other Smartwool products which may be why it has a different very slim/athletic fit. It appears to be a designed as a bicycle jersey, judging by the length of the zipper, however I am sure it will work great as a layer under ski jacket.

these Smartwool are better than the other smartwool shirts. The other regulart midweight turtleneck shirts used to be the best shirts you could buy, but these have a better shape a better look, and a longer zipper(which is awesome) great to have a longer zipper. by the way you make it WAY TOO HARD TO WRITE A REVIEW BY MAKING US FIGURE OUT WHAT OUR PASSWORD IS AND HAVING TO SCREW AROUND FOR !) MINUTES TO HAVE YOU EMAIL US ANOTHER ONE. ITs amazing that i took the time to dick around with this.

Looks great in picture, but.....much thinner than several other smartwool tops I have, I am an easy fit large for most tops and other smartwool tops. This fits tight to body, does not 'drape', its like a lycra bicycle jersey. The cut is 'off'. I am slim athletic build and it just doesnt look right. (Other smartwool tops look great) Might be ok as underwear, but then $90 is much too high a price, so am returning it. I might buy it at half price, for the looks. Maybe it would look good on you? maybe if it was made in Italy and not Viet Nam?
The design would look great in slightly heavier weight and looser fit.
Too bad.