Brian F.wrote a review of Columbia Baselayer Midweight Top - Men's on February 1, 2013
Familiarity: I've used it several times
This base layer rocks. I can wear it on winter hikes in New England from bottom to top. Its pretty dang warm but thin enough to breath so I dont overheat when its warmer.
Edit: This is ideal for higher intensity activities. Not good for just hanging out in the snow.