I'm surprised at the above. Not that I own any of their shirts, but I saw them in person and the material seems pretty thick (at least for the printed ones this SS).
I tired on the Westpoint in rust, and is it me or do are they slimmer in the leg? Comparing them with sand color Westpoint the have (not sure from what season)
http://korvue.shophaberdash.com has a bunch of trickers on sale, store is in the US. Good size run. I have not been able to nail my sizing down, since I probably need a 7 or 7.5.