This shirt comes very close to being the ideal base layer. As with all merino pieces (Icebreaker, Ibex, Smartwool) it breathes well, doesn't itch and doesn't stink. As for the specific design:
Pros: -Long cut stays in pants well
-Thumb loop seam is on the outside of the hand, meaning it isn't uncomfortable to wear gloves or bike (ahem, Icebreaker)
-Zipper is extra-long for venting
-Chest pocket
Cons: -Base layer seams really should be flat-locked. This could chafe after a long day.
-The pocket goes a bit too far left, snacks occasionally migrate to the underarms.
If this place fixes those two things for the next version and leaves the rest the same, this shirt will be perfect.

The shirt is lightweight, but warm and comfortable. I wear it running around town, running, x-country skiing and snowshoeing. The size was just what I expected. I highly recommend the shirt.

I bought one during the mid year sale. Not sure it's worth 4 stars at regular cost.

I like the mock Tneck that zips ... the chest pocket is a nice feature too. Fits pretty tight through the torso. Looks good, decent style & best suited to mid-layer.

I have been using this shirt for the last 5 months. On the plus side, the fabric is great! Perfect weight for mild weather, layering, really soft next to skin, easy to wash, and durable/long lasting. I really like the chest pocket, it's very functional and a great feature.

I'm not a big fan of the thumb holes. They're helpful when layering but, get in the way when your just wearing the shirt by itself. Rolling up the sleeves works, but you end up with a bunch of fabric around your wrist.

I own a few merino wool shirts this one is up to par on quality. A great perk is the thumb holes in the sleeves. They are in the perfect spot so the sleeves don't stretch when you use them. The chest pocket isn't the most useful since the material is so flexible. The shirt looks so good that you really could wear it on a bike ride and then go out afterwards.

I've worn this in a variety of conditions now, and I love it. Good breathability, solid warmth, good fit. The thumb loops and zippered pocket are nice touches. Lastly, as I'm sure everyone else has noted, the wool does not stink after several wears.

Far better than the Smart wool shirts I have. The collar is non stretchy and stands up or lies down nicely the contrasting colors make it wearable as the only layer. Nice touch to have reflective highlights on the sleeve and collar but when I run at night in the dark I would like some reflectivity on my back (seeing I do no have eyes that look that way).

I used this skiing over my spring break and wore it about four days straight, and even after all that it still didn't smell. Good fit, I'm 6'2 180 and a large is perfect. Extremely warm as well, one of the lightest, yet warmest shirts I have owned. Great product as a great price!

Well, I'm a big icebreaker fan. But this item is at least as good icebreaker's wool shirts. Similar to Icebreaker Men's Bodyfit 200 Mondo Zip. Breathes well, doesn't itch and doesn't stink. Looks good too. MADE IN CANADA! Worked perfectly as a base layer for alpine skiing. Sizing similar to icebreaker.

This shirt worked great. Not too hot, not too cold... just right.

Good thin and warm layer, fits nice. Not a good base layer, get a polypro for underneath. Dries fairly quickly but feels wet when it is.