This could be your new go-to shirt. The Sawyer shirt from Osmium is crafted from Japanese Chambray, meticulously stitched with felled side seams, pre-shrunk and made right here, in the USA. Osmium talks a bit about what it takes to source great materials for their designs, here. I highly suggest taking a peak at their Journal and reading what they think makes a handsome shirt.
Earlier posts about Osmium, here.