Icebreaker Men's Long Sleeve Atlas Shirt

Excellent, functional
This is a great baselayer. I have both 150 and 200 wool garments and I find that the 150 is more comfortable than the 200 wool. I can also use the 150 for temps down to the 30's when doing activities, although others might opt for the 200 at this range. Anything cooler than that and I use my 200 wool. The fit is perfect for my size... I am 5'10 165lbs 40" chest 11% body fat and the fit is really nice. The raglan sleeve is useful especially since i wear this when doing active things (hiking/biking). The one drawback is I think the sleeve is a half inch too long for me (I just pull the sleeve up a bit and its perfect). 5 stars!!!

Great baselayers year round
About 4 years ago I bought 3 of these and liked them so much (I was wearing them every day) that I bought 3 more to add to the rotation. I simply wash with all the rest of my clothes and hang to dry. A couple of times the sleeves got spun up on the washing machine agitator, but the seams are stitched so well there was never any damage. These shirts wick moisture away and dry out fast, don't get nearly as funky after days on the trail and provide me the perfect base to build on year round. In the summer too much sun can make me feel ill so the long sleeves give me added protection while still being thin enough so I don't overheat. I'm 5'11 200# and the large fits me well (not skin tight).

Great Shirt Fitted or Oversized
I buy a lot of Icebreaker--I have about 10 different models/shirts. I bought this again after almost always going back to my first Atlas instead of choosing to wear my Bodyfit 200 shirts. The 150 is light enough to not feel a bit too warm on the slightly warmer days. I tend to wear a medium and sometimes I prefer to not be "bodyfit" and thus order a bit larger for more casual wear than a tighter baselayer. I also prefer the lighter weight/feel of the 150 on my body. Merino wool has some advantages to synthetics but wool is a heavier material. Anyway, I oversized to an XL on my first Atlas and did so for my second Atlas. I use the dryer with these shirts so the oversizing helps a bit in this respect, too. For casual everyday wear with cargo shorts, you'd have no idea that this shirt is an XL in either the length or sleeve. I'm 5'10 with 39 chest and 31 waist with 33 sleeve. Durability has been even better than some of my GT150s, which is surprising because the GT adds Lycra for a more retained fit and durability; however, the GT is woven a bit more airy with breathing panels, etc. The 150 is a solid weave and hasn't shown as much wear as the GT. I tend to prefer 150 weight and forgo the 200 almost all of the time. When I need warmth I go up to a 260. With the logo on the front the 150 looks a little less like a plain/athletic shirt for everyday use.