I have the merino shirt and love it. I have the 2XL and it fits perfect for a tall guy - I'm 6'4" 225 pounds and couldn't ask for a better length in the sleeves and overall fit. It is a light merino and works great when it gets hot, best hot weather shirt I have used. As for durability, I used it all season and not a single snag. Did five days on the border hunting coues deer in the nastiest, thorniest country I've ever seen, no tears, snags, etc. Very impressed.