David Page wrote a review of SmartWool PhD HyFi 1/2-Zip Top - Men's on December 4, 2012
Familiarity: I've used it once or twice and have initial impressions
I bought this with high hopes but the neck proved a tighter fit relative to the how chest fit. At 5'10",182 lbs, I would normally wear a large in most and the chest for a large fit well with a long underwear tight underneath but the neck was uncomfortably tight and restricting. Basically, the neck seemed for me to be out of proportion with the body. Otherwise, the material was awesome and the piece very functional. At this price, however, things need to fit very well.