Chris Simmons wrote a review of Outdoor Research Growler Shirt - Short-Sleeve - Men's on May 16, 2013
A few years ago I started experimenting with - and preferring - button down shirts to short-sleeve t-shirt base layers for any time I'd actually be stripped down to that shirt. I like the looser fit, a collar I can flip up to protect my next from the sun, and the option to open a button or two for more ventilation on hot days. I have a couple of other examples of this from Outdoor Research, but this time I think they're really nailed it with the fabric. It breathes great but still looks casual, and its become my preferred shirt for spring ski tours, summer climbs, and long trail runs. I just spent a month skiing and trail running in the Alps, and this was one of three button-down shirts I had for the trip.