I've had mixed results so far with the Sitka Armor Spun stuff. I picked up both a hoodie and T-shirt in the armor spun 120 weight. Used the hoodie on a mule deer hunt with good success, but the T-shirt got a couple holes in it on the car ride to the hunt. Not sure how but I was pretty disappointed there. The hoodie seems to be in great shape still and it took more of a beating so I'm a little at a loss as to what's going on. That said, it's a really comfortable lightweight Merino blend.
I do see a big difference in durability with the Merino blends holding up much better than straight Merino fabric of a similar weight. Before giving the Sitka Armor spun stuff a go I've had the best luck with Voormi's lightweight Merino. It's not quite as soft as First Lite, Sitka, and Minus33 but it's super light and remarkably durable for the weight. If the Sitka hoodie holds up I wouldn't hesitate to buy Merino blends from any of those brands again.
I have one Kuiu nuyarn piece and it's been very durable but it's by far the least comfortable of any Merino piece I've ever tried. Very little stretch and much more itchy.
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