I have used this shirt in the past and it makes a great base layer. The problem I had with this order was the sizing. I like the base to fit snug and the ones I have used in the past were perfect. This order was the large/tall size, which the Columbia size guide says should fit chest size 42.5 - 44. I have a 42 inch chest and this shirt was way too big. I measured the circumference of the chest on this shirt and found it to be 48 inches. The next chest size smaller is the medium, so I ordered that. It was way too small, with the chest circumference measuring 38 inches. It fit my wife well, so she will use it. I think I'll try ordering a regular large and see if it fits any better in the chest. Hope so, because I really like the shirt.

Not very comfortable and not a whole lot of give to the material. Feels like you are wearing tinfoil. Had I not have to pay a crazy return postage I would send it back.

Columbia Omni-Heat is the thinnest, softest and warmest base layer I've ever owned. Worth every penny

I thought this was too tight at first but it fits very nicely. Quality is superb and thermal insulations is quite good.

I got this baselayer shirt for large size. It feels a little snug but very warm. If I would get the next size it would be too big. The quality feels nice.