I wear this shirt A LOT. Its warm, super durable, and looks great. This isn't some thin, wont keep you warm, gets snagged on something and rips, crap flannel. Its thick, and ready to take whatever you can throw at it. Right when you put this thing on, you immediately feel reassurance in your purchase. Filson makes quality time pieces that generally out live their owners. The only reason I dont give this guide shirt a 5 star rating is because the fit. FILSON RUNS BIG.. seriously. Its not a joke. You most likely need to go a full size down in all their products. I'm 6'2, 200lbs and the Medium is a little long on me.. Although I have a jacket on over the flannel in my picture, you can see the length of it on me. Everything else about it fits great though.
Side Note - Filson isn't trying to be your tech, moisture wicking, air - micro - anti -breathable - over the top company. They make quality pieces that have lasted the test of time...usually pairing well with the beer / whiskey drinking, pool playing, dart throwing, shot ski taking, bet winning, motorcycle riding into the sunset blasting Motley Crue not knowing where you'll wake up or caring.. type of person. Or maybe you just like reading a book at the park??
Idk.. just buy the damn shirt, you wont regret it.