Very comfortable and breathable, I wore these over my base layer on summit night and bye bye sweat! Only complaint is that this shirt is not very durable as the waffer-like material gets caught easily when putting on backpacks and files away. I've had this shirt for a month and I can already see lots of torn spots.

I bought this shirt/pullover with no prior knowledge of fit or feel. When it arrived and I took it out of the package, I was surprised at how light the material was. After putting it on and wearing it for a few minutes I knew I was going to really like this shirt.
It makes a terrific base layer and is equally fine, alone.
The sleeve length, which is usually a problem for me with my long arms, is perfect! In fact, it may run a little long on some.
The build quality, stitching and material are top notch. I liked this shirt so much I ordered two for my wife. She loves them, too!

I got this for my husband and he is overjoyed with it, to the point where he insists on only buying the same model of Columbia base layers, tops and bottoms!!!! This makes shopping for him more difficult but tells you just how pleased he is!!!!

Very comfortable. I use it for running and just casual wear. It's warm enough on cold run, but fits better than some running shirts I have. And was cheaper! Quality shirt.