These shirts are fantastic. I’m 6’2” 185 with a thin build; I purchased Large and the fit is great. It comes down to personal preference, but I typically have trouble finding shirts long enough. This shirt is the longest wool t-shirt I’ve found, and I’ve purchased from Ridge Merino, Smartwool, and Proof (which are all quality shirts).. they just don’t have the length the Woolx offers. The closest would be Ridge, and these are about 1/2 inch longer. Outside of that, the material and stitching is excellent. I purchased 2 of these shirts and I’ve only owned them for a month, so I can’t yet speak to longevity/durability. I took some advice to hang dry instead of putting them in the dryer, which has prevented any shrinkage. It’s true you can wear these shirts for multiple days without washing. They air out well and dry quickly. Probably the best travel/outdoor shirt money can buy.