My name is David and I recently purchased the Marmot Half Zip Evolution long sleeve shirt from backcountry. Never have I bought a product and gotten so much out of it. I went to the high Canadian arctic to a national park called Auyuiittu. I hiked through ancient glaciers and fjords for over eight days and the Marmot shirt was on me 24/7. It was a perfect mid layer, or even base layer when the sun was out and the wind finally stopped. It is definitely worth the money. I am going to buy stock in marmot. Completely water proof, highly breathable, and more comfortable then gods own robes.
If it works 150km north of the Arctic Circle, and delivers these kinds of results, then you know its good.