These shirts perform great, both as base-layers and casual shirts. No need to fear moisture with this on. I went with black/blue and they look great. I wear them ALL the time... but beware anything which can pull the threads. They're fairly thin, and prone to damage depending on your activities.

Technically an awesome shirt but beware of the colors. They tend to be 80's neon-ish. I have a red and blue one and both are very bright. I guess they're helpful if you get lost and need something bright to wave but I only wear them under something else. As far as size they are perfect, they breath and wick moisture great.

Great fabric and styling. No seams on top of shoulders--nice under pack straps. No itchy neck tags--heat transfer label instead. Very comfortable on skin. Dries very fast. Minimal body odor retention noted with constant wearing on recent 4 day back country trip in Glacier National Park.
Excellent quality. Just over 5 oz on my scale for size large.