I absolutely love my Icebreaker BodyFit 260 top. It is warm for the weight, very stretchy and best of all - DOES NOT COLLECT ODOR, even after multi-day use in Patagonia, where I was sweating a lot! The arms are fairly long and I like the thumb holders, which when not in use are out of the way. My only wish for this top, as with most tops - because of my long torso, is for longer torso length. My torso is crazy long though...I am 6'2" and my pant inseam is 33"! So for most folks it will be plenty long enough. I have used this shirt steadily in winter and when on expeditions for the past 3 years and it is still going strong! The only place it is showing wear is around the cuffs, which is no surprise as I have kept the thumbs in to offer protection to the back of my hands while crack climbing on the sharp granite of Cerro Torre during the FA of the complete SE Ridge. I am a huge fan of Icereaker and especially this piece.

Not impressed. I have heard great things about Icebreaker and thought I'd give this a shot but was disappointed in the fit. I'm 6' 190 lbs and ordered the Large and found that it fit perfect in the shoulders, but it was baggy in the armpits. Also, when you have your thumbs in, it has too much excess material in the wrist area. I guess I was hoping for more of a technical fit. It didn't seem as soft as the other merino wool pieces I own either. I'm bummed it didn't work for me, it seemed other people had better luck. For $110 I was expecting more..

This piece rocks. I love the merino wool. Whether wearing this top to the lab or work or the mountain I know that I'll be looking good while staying comfortable. The sizes run small, so order up if you're in between.

I went for a walk on the beach the other day and was wearing this top. It was about 58 degrees and mind you the ocean was about 60. I was collecting shells for my lady and I saw a good one out in the water, so I stuck my arm in sleeve down and all, all the way up to my elbow. The shirt was soaking wet yet it remained warm. I couldnt even tell it was wet. I felt warm and dry, as warm and dry as the arm that was actually dry. So a great shirt it keeps you warm when wet or dry, it doesnt itch.
As far as sizing. I have two of em. I am 6'1" with a 45" chest (actual measurement). I have an XL to use as a base layer, it fits well, I can put a thin shirt underneather if needed and I have a XXL to wear as a mid type layer (I can fit a regular tshirt underneathe.

Great Stuff all around

Meh, I love my other Icebreaker stuff, but this piece just doesn't do it for me. It's not warm enough for its weight, so I end up leaving it at home. Also, it's not nearly as comfy as the lighter weights. The sleeves have thumbholes, however, which are really sweet. So, bonus star for that.

I've had one of these for about a month - it is my favorite midweight layer. It's not itchy at all and provides excellent moisture regulation. The collar is a perfect height and the zipper is heavy-duty and of adequate length, and the thumbholes in the sleeves are a nice touch when wearing under a shell. It looks pretty good when wearing into the office with jeans, too!

While Icebreaker is a bit more expensive than competing wool brands (smartwool, patagonia) it is worth it. Absolutely "go-to" base layer in colder conditions. The sleeves and thumbloops are perfect length for me in XL (6'2", 210lbs, 35" sleeve, 46" chest), the neck is perfect in height and snugness (both smartwool and especially patagonia fall down miserably here, this is a TURTLENECK for god's sake) and it is a trim enough base-layer fit to put another layer over or a thin layer under without issue. Great comfortable temperature range over any synthetic, can truly go a long time (1 week +) without washing, washes well...you can live in this stuff (I do about half the year). I'm not a fan of some of the funky colors, preferring basic black, but this is one of the best baselayers for cold /cool weather bar none. You will never wear capilene or equivalent again, and the fit and finish is better than any othr wool brand I have seen.

I was skeptical at first. I have seen a lot of miracle-materials come and go with mixed results - capilene, smartwool, the paint-on condom...but this was on sale, and I went for it. Oh man, can you say new favorite base layer? First of all, I don't find it completely non-itchy. Maybe I'm extra sensitive to wool (I could never wear a wool sweater without a long sleeve shirt underneath, yet I do love lamb kabobs), but I do feel a bit itchy when first putting it on. The itchy feeling is gone within minutes though, and I can keep wearing the shirt for days at a time in total comfort. And that's the other great thing about it - the odor resistance really is as impressive as they say. It is so good that I find myself sniffing it again and again, waiting for it to release the hidden funk, but there just is none. I sweat a lot, and to have a base layer that wicks it all while smelling nice is so unusual that I'm suspecting they've made a deal with the dark one. Wear it by itself and it will keep you cool and dry. Wear it under a windbreaker, and you're ready for any moderate weather. Wear it under a soft shell, and you're going to be toasty no matter where you go. I'd love to say that I'm going to order more of these, but really, the one is already doing the job of 3 or so other base layers that I haven't reached for since I got this one. If these guys ever start making underwear, I'll buy it in bulk.

I was turned on to Icebreaker a few years ago. At first I was not certain it would work as well as described, however after only a little experience with it I have changed my tune. This stuff is amazing. I buy up everything that fits me on Steep and Cheap. I have given away all of my capiline. ICEBREAKER all the way.

I love the merino wool. It is extremely comfortable and has all of the properties the description brags about. Icebreaker stuff fits tight so I order a size up, I get XL's when with other brands I wear L's.

The XL fits me well (6'5" 215#). The thumb holes are nice. Neck comes up far enough to keep you warm. I usually wear this along with another tech layer.

Pretty pricey, but worth it. Kept me sweat free and warm for 2 straight days of high alpine hiking. Fit is nice and keeps the stink off.