Mammut

Crashiano Long-Sleeve Shirt - Men's

I wear this all the time, under a heavier coat or as a sweater. My only negative is that site recommended an XXL (I'm 6'3, 250lb) but an XL would be a better fit as its a bit big.

Awesome base layer you can wear to work

Perfect fit for me and a great base layer. I've had an old north face similar to this for years but the hole got to big after a while. This was the perfect replacement. The sizing for this shirt is the same as a patagonia R1 if your not able to try on in person. I use it rock climbing skiing mountaineer and I wear it to work. So far it's durable hopefully it will last as long as the old north face.