Workout wear with high standards of temperature regulation and comfort.

Icebreaker uses merino wool in its Men's BodyFit 150-Ultralite Anatomica Short-Sleeve Crew to keep you comfortable in high-aerobic activities like trail running in summer. It regulates your body temperature so you're neither too warm nor too cold. It breathes and manages moisture so you stay comfortable and dry. And it stays fresh after multiple uses. Icebreaker added a bit of Lycra for a body-hugging fit that doesn't restrict your range of motion. And set-in sleeves gives you the freedom of movement you need what you're working out.

  • Merino wool blend
  • Natural antimicrobial odor-resistance
  • Slim fit
  • Smooth flatlock seams
  • Reviews
  • Q & A

Too tight for me

  • Familiarity: I returned this product before using it
  • Fit: Runs small
  • Size Bought: Large

I didn't read the "bodyfit" part of the description carefully enough. This is a very tight shirt.

I got this in a large and I'm pretty big guy, 6'4", 210, average build and this shirt was super unflattering on me. If you are a slim/ripped dude, this might be the perfect shirt, but this just wasn't going to happen for me. I tried it on and immediately knew it wouldn't work.

I have some Icebreaker Tech T Lites in a Large and they fit great and are much more flattering to those of us with dad bods. I could have tried this in XL and it might have worked better but I'm going to stick with the Tech T Lites from Icebreaker and the Smartwool 150 shirts because I like the fit of those better.

Super Hero Base Layer

  • Familiarity: I've put it through the wringer
  • Fit: True to size

The review will be more helpful if I describe what I was looking for, and then how the shirt compares.

I was looking for a tight fitting (but not restrictive) AND longer length merino t shirt for high output winter activities. This is to be worn by itself on warmer days, or under a Black Diamond Coefficient fleece on colder days. The fleece is quite form fitting, and so it was key that the shirt was too, to prevent any awkward material bunching. I also wanted a longer length to tuck in, to keep heat in and keep snow out.

The shirt is perfect in every aspect. I bought 6 merino shirts to try them all on and this was the one I kept. The merino is warm and soft, not itchy at all. The shirt fits perfectly (for me) in a large, and I am 6'5 and weigh about 200 pounds.

This same shirt in an XL, fits very much like a "daily" t shirt, although maybe a bit more form fitting. The extra length is great for taller guys.

Also worth noting is the power or the natural anti funk of merino wool. Ill spare you the details but we'll just say that after multiple uses with lots of sweating involved this shirt does not smell AT ALL! The same cannot be said for my synthetic base layers...

Dirty shirt

    Shirts themselves are amazing. Light. Breathable. Great fit (snug but not clingy). However, one of the two shirts that I ordered arrived with a stain on the neck, so docking a star for that.

    Dirty shirt

    The best

    • Familiarity: I've used it several times
    • Fit: True to size
    • Size Bought: Medium

    I will not wear any other t-shirts

    100 Stars, if I could

    • Familiarity: I've put it through the wringer
    • Fit: True to size
    • Size Bought: Large

    This product (as most of Icebreaker products) doesn't really need any more praise, but I couldn't resist. This is definitely my favourite t-shirt -- not just base layer.

    Some practical info that people might actually find useful:

    All my clothing is normally size L with European brands, but with the US ones, it's always a hit or miss when I order online as it's always between M and L, and neither works.

    Icebreaker has a really nice 42 chest L, which hits the sweet spot. For this struggling to fit into M and not fall out of L -- look no further.

    PS: I also have longsleeve version of this and the following I can say about both of them

    It's super lightweight, yet amazingly warm. I'm currently in Russia and winters are harsh, but this ultra thin base layer and simple fleece hoodie underneath a wind/rain shell keep me nice and toasty while walking in the woods on photo trips at -10C. I was blown away by the warmth and moisture wicking it provides. (It does get warm and steamy when I scramble up a hill through a sea of powder, but this shirt is incredibly good at dealing with moisture and temperature regulation).

    Great basic T

    • Familiarity: I've used it several times

    Great shirt - really comfortable, wicks well, and does not retain odors even with a lot of activity. I bought the Admiral color and love it.

    Great shirt

    • Familiarity: I've used it several times
    • Fit: True to size
    • Size Bought: Medium

    This has become my favorite shirt for all hikes on the Appalachian Trail and Kennesaw Mountain. Can wear by itself on nice day or layer on cooler days.

    Amazing feel!

    • Familiarity: I've put it through the wringer
    • Fit: True to size
    • Size Bought: Large

    I've used these shirts for hiking, climbing, and on the water. They're my favorites for the nice fit and comfortable fabric.

    This will become your favorite T-shirt!

    • Familiarity: I've put it through the wringer
    • Fit: Runs small
    • Size Bought: XL

    This is my second 150-wt Anatomica T-shirt, and I completely love the style, fit, and comfort this shirt provides. I'm a lanky 6', 5", 220 lbs, and the XL fits me perfectly - trim without being constrictive in any way. (The XL fits like a "normal" Large in most US brands). These have become my go-to shirts for mountain biking, backpacking, hiking, and just wearing around town. If you're long and lean, you definitely need to try one of these on.
    It's comfort/temp range is impressive--I use it as my base layer in the winter, but it performs just as well in 95 degree heat.
    The 150-wt Anatomica is much more versatile than their 200-wt shirts, and they fit trimmer/slimmer than the Aero or Tech T lite shirts. When these are on sale, buy a couple!

    Felt great while in 85 degree weather

    • Familiarity: I've used it once or twice and have initial impressions
    • Fit: True to size
    • Size Bought: xxl

    Used Smartwool under ware for 18+ days in Spain, 13 on the Camino France, clocking in 200 miles.

    These felt better given the small amount of lycra. Did not cling to my body when I took a little 12 mile walk around Sacramento in 85 degree weather.

    Very comfortable

    • Familiarity: I've used it several times
    • Fit: True to size

    This is my second Icebreaker T-shirt. It is very comfortable in a wide range of temperatures.

    Body fit

    • Familiarity: I've used it once or twice and have initial impressions
    • Fit: True to size
    • Size Bought: EXTRA Large

    The description is slim fit and in case you haven't worn "BodyFit" or Anatomica, you should know that it is body-fitting tight. I ordered a size up since I want to wear it more casually, as well. I wear a LARGE in Tech T Lite and other casual Icebreaker shirts, but I ordered an XL in this shirt and it fits great. If you want it primarily for working out or layering in the cold, order your normal size.

    Sweet shirt for working out!

    • Familiarity: I've put it through the wringer
    • Fit: True to size
    • Size Bought: large

    This is a great shirt for working out! It is fitted and wicks away moisture really well!

    Great Shirt

    • Familiarity: I've used it once or twice and have initial impressions
    • Fit: True to size

    This is a comfortable fit and keeps me warm when it is breezy and cool in the sun, I was very impressed with this shirt!!

    Sweet shirt

    • Familiarity: I've put it through the wringer
    • Fit: True to size

    See my review of the icebreaker tank top. This shirt is every bit just as good, except that it has sleeves. Thus, I do not use it for my high output activities during the spring, but instead use it as a baselayer for skiing during the winter and early spring. Also, this shirt is freaking stylin, I wear it around town all the time because it is just soo comfortable and looks good. Lastly, the fit is great.

    Wicking and comfortable t-shirt

    • Familiarity: I've used it several times
    • Fit: True to size

    This is a great shirt for hiking, skiing and almost any aerobic activity.

    Anatomica SS

      Super lightweight and good for all seasons.

      I've worn it as an undershirt which is perfect for chilly bike rides to school. It's quite slim and form fitting which makes it good for layering. When you want a light layer but don't want a full long sleeve baselayer, this would be a good option.

      I haven't had the chance to wear it much in the warmer seasons but it would be a good shirt for activities like trail running. Merino wool keeps you warm when its chilly, but also wicks moisture and breathes very well too.



      I'm 6'2" 175 (on a good day) and Large fits pretty well for me. It was a bit longer than I was expecting (not a bad thing), and sleeves are pretty short.