Full Tilt wrote a review of Backcountry.com Merino 150 Base Layer– Long Sleeve – Men's on August 19, 2014
Familiarity: I've used it several times
Fit: True to size
This is my favorite light zip. Great athletic fit, perfect weight. I generally wear it as a top with a t-shirt underneath. In my opinion the neck is just a little too big to be used effectively as a base layer.