Well after getting some first lite merino wool a few months ago, I have put it to the test every way that I could think possible to test its durability and insulating qualities. I have worn under armour, as well as many other brands of base layers of the last few years, and nothing has compared to the merino wool from first lite. I wrote up a short little overview of what I thought of the shirt I have been testing, as well as my view on its pros and cons. You can find my thoughts on first lite merino wool through the follow url: