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The Icebreaker Beast 150 Boxer Brief's pure merino fabric feels soft and smooth next to skin, and its comfy contoured pouch keeps your goods under wraps. Icebreaker designed the Beast 150s with articulated side seams to reduce chafing and make your movements feel more natural. Merino harbors neither moisture nor odor, so bid junk-funk adieu.

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Here's what others have to say...


Not my favorite

    I honestly wanted to like these as I like most icebreakers gear, but after 3-5 hours wearing these they lose their shape and 'things' start falling out. I had better luck with the body fit 200's



    • Gender:Male
    • Familiarity:I've used it several times

    ended up buying 4+ pairs of these, they fit great and perform like no other


    Go Up a size

      I have 2 other pairs of Icebreaker underwear, all in medium. The fit on these is tighter, so I recommend going up a size.
      The wool is soft and feels great though.


      Johnson will think he's the Sultan of Brunei

        I have the older version of these and they are fantastic. They offer little stretch however for not having any lycra through the fabric they hold their shape fairly well. Because they don't stretch they offer more support than the beast anatomica line and in my opinion feel better when you first put them on. But by the end of the day they do loosen up a little where the anatomicas will hold its shape much better for longer. These feel much more durable than the anatomicas and because of that i end up wearing these much more. The fit is spot on and the pouch accommodates a ton of junk comfortably, I know. If you have fantasized about A/C for your underpants this is as close as you can get.


        Really odd fit

          Most people seem to love the icebreaker boxer, but the fit on these was just odd. For one, the crotch was, well, huge. It was also just cut oddly everywhere else. It wasn't cut loose enough to fit like a normal boxer, but it was still too loose to fit like boxer briefs (and the legs were fairly short as well). The end result was that it felt like they were always riding up into a wedgie when I wore them.
          I like most of Icebreaker's other stuff, but this just did not work for me. I ended up replacing them with a Smartwool boxer brief, which had a similar weight but a much more standard cut.


          so so

            It is a little to early to judge these fully I have worn them as often as I can after washes. Innitial fit seems fine but the latter part of the wear is a little loose, oh and not a real fan of the seam in the crack side it goes where I think that it shouldn't. No excessive funk. getting used to them is difficult, I got hooked on the Underarmor boxer briefs my first deployment back in 2004 and have not worn anything else since. I still have the first pairs that I bought and they still fit like new. I will be attempting these. deffinately will not be replacing the underarmor, just looking for more of a long wear undie the underarmors will get the goat like smell at the end of a long hot day in Iraq stuffed in a convoy truck and do not fair well funk wise on long through hikes.