Marmot Men's Lightweight Crew LS

I wore this shirt on two hikes. I wore it under a wicking t shirt and  a fleece vest and fleece light shirt. The temperatures ranged from the 30-50 range. I felt comfortable like it was part of my skin.

As my hike increased in terrain I started to remove layers and the only thing protecting my arms were the long sleeve's of this shirt. I never felt hot or cold. It kept me at the right tempature range and any perspiration that was built up was being wicked away.

I found this is the baselayer for me in many activities.