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Merino 150 Boxer Brief - Men's

3.3333333333333335 out of 5 stars
3 Reviews

Out of Stock

Don't worry though, we have a lot more Men's Underwear in stock than that.

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Merino 150 Boxer Brief

While comfort is a relative experience, it's pretty clear that such an experience can be universally achieved by way of wearing, well, comfortable underwear—much like the SmartWool Men's Merino 150 Boxer Brief. This boxer brief features Smartwool's lightest merino wool which regulates your temperature and manages moisture with ease. The design includes a fully functional fly for your convenience, while the smooth waist band and flatlock seams prevent chafing or hot spots. So no matter if your day takes you to the trails, gym, or simply to the office, the 150 Boxer Brief assures adaptive performance and steadfast comfort.


  • Maintain comfort with this boxer brief
  • Merino wool wicks away moisture and dries quickly
  • Fully functional fly for your convenience
  • Smooth waist band and flatlock seams prevent hot spots
  • Item #SWL00RF
87% merino, 13% nylon
boxer brief
[medium] 6.5in
natural attribute of wool
Manufacturer Warranty
2 years

Overall Rating

3.5 based on 3 ratings

Review Summary

1 Stars - 1 reviews
2 Stars - 0 reviews
3 Stars - 0 reviews
4 Stars - 1 reviews
5 Stars - 1 reviews

Fits True To Size

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1 out of 5 stars

September 25, 2022

Horrible durability

I've used it several times

All three pairs I bought developed large holes in the crotch within a few short months.

Tyeler R

Originally reviewed on Backcountry.com

5 out of 5 stars

September 22, 2021

Worth the extra cost

I've put it through the wringer

I have tested a couple pairs over the Pacific Crest Trail and was very satisfied. Despite use with heavy activity for a couple weeks between washes, odor was never an issue. Good breathability, durability, and comfort. The merino is worth the extra expense for any backpacking or extended traveling over a cheaper synthetic.

Jeremy S

Originally reviewed on Backcountry.com

4 out of 5 stars

August 3, 2021

Comfortable and odor resistant

I've used it several times

These boxer briefs are pretty comfortable and decently odor-resistant. I wore them during a recent backpacking trip and they performed well. I can't attest to their durability yet, but so far so good. I would pick up a couple more pairs during sales, but probably not for full sticker price.

Abe T

Originally reviewed on Backcountry.com