Great Merino T 150
I now have two (2) of these and they are becoming my favorite casual T shirt. I prefer the 150 weight particularly during the summer as the 200 weight is a bit heavy for me. Sweat all you want and it won't get musky. Wash cold and hang to dry. I am 6'4" 208 lbs and the large fits just fine for casual wear. My only wish is that Backcountry/Icebreaker had a few more colors available in Large.