Three pairs of green and black merino wool boxer brief shorts on a white background
100% merino wool boxer briefs. Lightweight all season wool underwear front
100% merino wool boxer briefs. Lightweight all season wool underwear, front view of the boxer briefs

Lightweight 170 Men's Boxer Brief 3-Pack 100% Merino Wool

Regular price $134.97 Sale price$121.49 Save $13.48
/
Size
Size chart

Measurements

Please note, measurements refer to body size, not garment dimensions, unless otherwise noted. Measurements are in inches.



Men's Clothing Size Chart


Size Chest (in) Waist (in) Sleeve Length (in) Shirt Length (in) Inseam (in)
XS 33-35 24-27 30-31 25.5-26.5 25-27
S 35-38 28-30 31-32 26.5-27.5 28-30
M 39-41 31-33 32-33 27.5-28.5 29-32
L 42-45 34-36 33-34 28.5-29.5 32-34
XL 46-48 37-40 34-35 29.5-30.5 32-35
XXL 49-52 41-44 35-36 30.5-31.5 34-35
XXXL 52-54 45-49 36-37 31.5-32.5 34-36


Men's Big and Tall Clothing Size Chart


Size Chest (in) Waist (in) Sleeve Length (in) Shirt Length (in) Inseam (in)
MT 39-41 31-33 35-36 30.5-31.5 32-34
LT 42-45 34-36 36-37 31.5-32.5 33-36
XLT 46-48 37-40 37-38 32.5-33.5 33-36
2XT 49-52 41-44 38-39 33.5-34.5 34-36
3XT 52-54 45-49 39-40 34.5-35.5 35-37
4X 54-57 49-52 36-37 32.5-33.5 34-36
4XT 54-57 49-52 40-41 35.5-36.5 35-37
5X 57-59 52-54 36-37 33.5-34.5 34-36
6X 59-61 54-56 37-38 34.5-35.5 34-36

How to Measure

Chest: Measure the circumference around the fullest part of your chest, underneath the arms.

Waist: Measure the circumference around the natural waist, near the belly button.

Sleeve: Measure from your center back neck, to the elbow, to the wrist.

Shirt Length: This measurement refers to the approximate size of the shirt back length, from the neck to the bottom hem.

Inseam: Measure from the center of the crotch to the end of the ankle.


Shop Men's Clothing Shop Men's Big and Tall Clothing




Fit Types

Athletic Fit

Regular Fit

Relaxed Fit

Athletic Fit Regular Fit Relaxed Fit

Fits best as: Base Layer

Skin tight, slim, compression style fit. Wear this layer first and add on top of it if needed.

Fits best as: Base Layer, Mid Layer

True to size, standard fit with a little bit of room to breathe, but not too baggy. Perfect on its own or with a t-shirt or thin shirt underneath.

Fits best as: Mid Layer, Insulating Layer, Outer Layer

A little more room than you would find in a Regular fit. Enough space to fit 1-2 layers underneath.

Fit FAQs

What if I am between sizes?

If you are between sizes, we recommend sizing up or down based on what fit type you would prefer, and based on how you plan to wear the piece. Our knitted merino is stretchy and you could realistically go with either size. If you would prefer an Athletic fit, size down. If you prefer a Regular or Relaxed fit, size up.

Do I need to size up/down to layer?

Generally, no, you do not need to purchase a different size than normal. Our base layers are designed to fit right into your current layering system. They are also designed to work with other products in our line, too. You may wish to adjust your sizing if you plan to wear one of our garments in a way that it is not intended, if that's the case please feel free to contact our customer service team for help.

Does your clothing run true to size?

Yes, our clothing runs true to size and is sized similar to most other American brands. If a sizing discrepancy is discovered, you will see fit advice in that product's specific listing.

Not sure what size or fit type you need?

Learn more about layering systems and how they can help you choose. Still need help? Contact our customer service team for personalized advice.

  • In stock, ready to ship
  • Backordered, shipping soon
OEKO-TEX Standard 100

This certified product has been tested against a list of over 1,000 harmful substances, including PFAS.

Woolmark Certification

This certified product meets Woolmark standards, ensuring exceptional quality, reliability, and performance.

Our Guarantee

Holding a baby sheep in merino wool t shirt and merino wool crew shirt

LIGHTWEIGHT MERINO WOOL

  • 170 g/m
  • 100% Australian Merino Wool
  • Machine Wash & Dry
  • UPF 25

Our lightweight Merino wool is a versatile, all-season fabric that's ideal for hiking, running, biking, camping, and everyday wear. Perfect as a warm weather single layer, or as an underlayer in cooler conditions during spring, fall, and even winter. You can learn more about our different Merino fabric weights here.

Temperature (°F)

Temperature Icon
0°-30°
30°-60°
60°-90°

Activity Level

Activity Icon
LOW
MEDIUM
HIGH
  • 5 stars: 70 (83%)
  • 4 stars: 9 (11%)
  • 3 stars: 0 (0%)
  • 2 stars: 3 (4%)
  • 1 star: 2 (2%)
Some of the reviews shown are from the products included in this bundle.
N
Nathan Hanson (Chicago, US)
By far the best boxers on the

By far the best boxers on the market!!

Thank you so much for taking the time to share your feedback! We are thrilled to hear that you consider our Lightweight Merino Boxer Brief 3 Pack the best on the market.

Providing top-notch comfort and quality is what we strive for, so knowing these are hitting the mark for you truly makes our day.

If you like our Boxer Briefs, you would love our New Hampshire USA Made socks with a 5 year quality warranty. You can view them here: https://minus33.com/collections/usa-made-wool-socks

We really appreciate your support of Minus33 Merino Wool Clothing and look forward to outfitting you again soon!

Cory & the Minus33 Customer Service Team.

A
Anonymous (Montreal, CA)
Charcoal Gray / L
Primary Activity: Casual / Lifestyle
Inconsistent size

Like the woolverino 145 briefs, runs way too tight and at least a full size down. I don't expect I'll be wearing these much.

A
Anonymous (Queens, US)
Forest Green / L
Height: 5 11
Weight: 190
Primary Activity: Casual / Lifestyle
the best to wear, for white collar or blue collar

the best to wear, for white collar or blue collar work!

Hi there! We're thrilled to hear you find our Merino Wool Boxer Briefs versatile for any work environment. Thanks for the great review! Thank you so much for the fantastic feedback. We’re thrilled to hear our Lightweight 100% Merino Wool Boxer Briefs are your go‑to choice, whether you’re suited up for white‑collar work or putting in the hard hours on the job site, or out in the wilderness. Merino is made to move with you, keep you comfortable, and stay fresh all day, and it’s great to know they’re delivering exactly that for you. We appreciate you taking the time to share your experience and are glad to have you in the Minus33 crew.

A
Anonymous (Phoenix, US)
Tan 499 / S
Height: 5’8”
Weight: 180
Primary Activity: Hiking
Fit is excellent and these are very comfortable

Fit is excellent and these are very comfortable. I bought a pair to try out for backpacking. Great for preventing chaffing.

Thanks so much for the great feedback. We’re glad to hear the fit worked out perfectly and that the shirt kept you comfortable on your backpacking trip. Merino wool really shines when it comes to preventing chafing, so it’s great to know it delivered for you. We appreciate you giving it a try and hope it continues to serve you well on future adventures.

A
Anonymous (Cumming, US)
Black / M
Primary Activity: Workwear
Let the boys breath

⭐⭐⭐⭐⭐

I've tried a lot of different underwear over the years, and the Minus33 Lightweight 100% Merino Wool Boxer Briefs are some of the most comfortable I've worn. I work long shifts—often 12 to 14+ hours a day—in a duty uniform, and comfort matters when you're on your feet all day.

The merino wool does an excellent job managing moisture and regulating temperature. In hot, humid weather, they stay noticeably drier and more comfortable than cotton, and in cooler weather they provide just enough warmth without feeling bulky. They also breathe well, which helps reduce chafing and discomfort during long days.

One of the biggest advantages is odor control. Even after a long shift, they stay fresher than synthetic or cotton alternatives. The fabric is soft, comfortable against the skin, and doesn't have the itchiness some people associate with wool.

The fit is supportive without being restrictive, and they stay in place throughout the day without constantly needing adjustment. After switching to merino wool, it's hard to go back to traditional underwear.

I've had such a positive experience with these boxer briefs that I've gradually added more Minus33 products to my wardrobe. If you spend long hours working, traveling, hiking, or simply want more comfort than cotton provides, these are well worth trying.

D
Daniel Sweeney (Floyd, US)
Height: 6'3
Weight: 170
The only merino boxer-briefs for me.

I've owned two pair of these for about a year and just bought a three-pack this spring. After trying out a similar style from another company I can say without hesitation that these are the only 100% merino boxer briefs for me. They are incredibly comfortable, provide good support and moisture management, and even after some sweaty outdoor work they don't ever smell. I plan to buy more when mine wear out.

Thank you for taking the time to leave such a positive review for our Lightweight Merino Boxer Briefs. We're so happy to hear that you are enjoying the comfort, support, and moisture management of our product. We take great pride in using 100% merino wool to ensure performance and odor control. We appreciate your loyalty and look forward to providing you with more of our boxer briefs in the future.

A
Anonymous (Gypsum, US)
Tan 499 / S
Height: 5'10"
Weight: 180
Primary Activity: Hiking
great material

great material, love them!

S
Stephen (Gypsum, US)
Height: 5'10"
Weight: 180
Primary Activity: Casual / Lifestyle
material feels great! Wish they had a shorter

material feels great! Wish they had a shorter length option

J
John

Great fit

J
Jarred

Excellent feel! Worth the price for sure

J
Jarred

Excellent feel! Worth the price for sure

J
Jarred

Excellent feel! Worth the price for sure

A
Anonymous
Tan 499 / M
Primary Activity: Casual / Lifestyle
Did the job

Got what i paid for 👍

A
Anonymous (Singapore, SG)
Black / S
Height: 175
Weight: 68
Super soft, excellent for activity and fitness

Super soft and comfortable. Excellent for activity and fitness outside and in. I’m 30” waist and lean, and I chose a small, which works great for me. Has an athletic fit.

A
Anonymous (Kalamazoo, US)
Tan 499 / L
Height: 6’0”
Weight: 185#
Best underwear there is

Best underwear there is.

A
Anonymous (Atlanta, US)
Tan 499 / L
Great

Great product

L
Loki (Nashua, US)
Height: 6' 1"
Weight: 170
Primary Activity: Casual / Lifestyle
Best Underwear

Best Underwear Ever!

A
Anonymous (Coal Township, US)
Charcoal Gray / L
Primary Activity: Workwear
great

great product

S
Seth (Salt Lake City, US)
Charcoal Gray / XL
Height: 6’3”
Weight: 225
Primary Activity: Casual / Lifestyle
Best underwear I’ve owned!!!!

I’ve switch from cotton and polyester to these exclusively. They hide stink and absorb sweat. Crotch rot isn’t a problem no more. Spent 4 days at deer camp in the cold and heat of the desert. Didn’t feel I needed to change my underwear once. Hides the stink so well that when I got home and took them off I was like I need to shower!!! Great product. Supports extremely well too

J
Jesse Eaves (Oakland, US)
Tan 499 / M
Height: 5’6”
Weight: 180
Primary Activity: Workwear
10/10

Waist band doesn’t rub or itch. Material is light, breathable and comfortable. They don’t rise up when I’m working hard or ever. Straight up best undies I’ve ever worn.

Jesse,

Thank you for your glowing review of our Lightweight Acadian Men's Boxer Brief! We're thrilled to hear that our waistband is comfortable and doesn't cause any irritation. We take pride in using high-quality materials like 100% Merino Wool to ensure our products are lightweight and breathable. It's great to know that they also stay in place during physical activity. We appreciate your feedback and are happy to provide you with the best underwear experience.

-The Minus33 Team

P
Plumbob (Chicopee, US)
Black / M
Height: 5’9”
Weight: 175
Primary Activity: Casual / Lifestyle
Good fit

Good fit. Very comfortable

D
Dave in Tahoe (South Lake Tahoe, US)
Forest Green / L
Thought I would give them a try and I am glad I did.

Really comfortable and very soft. I am between sizes and I sized up... I am a 33-34 waist and went with the large as opposed to the medium. I think either would have worked, but glad I went with the large.

Hi there,

We're so happy to hear that you decided to give our Acadian Men's Boxer Brief a try and that you found them comfortable and soft. We understand the struggle of finding the right size, so we're glad that the large worked out for you. Thank you for taking the time to leave a review, we truly appreciate it!
Stay Cozy!
Sierra S
Minus33

M
MICHAEL
Black / L
Never cotton again

So far these are amazing underwear/briefs. They sit flat on legs, don't bunch up. Great for work and play, I wear to work at office/desk and play, ski touring, hiking. Have worn a few days in a row when I had to... Never again cotton. Haven't had the chance to use in summer hot, but know at 70 degrees these still are my go to underwear.

Hi Michael, thank you for your positive review! We're glad to hear that our Lightweight - Acadian Men's Boxer Brief is working well for both work and play. We also appreciate your feedback on the comfort and versatility of the briefs. We hope they continue to serve you well, and we're confident they will also be great in warmer weather. Thank you for choosing our product and for your support. Have a great day!
Best
~Sue

N
N.F (Montpelier, US)
Holes after a year of normal wear and care

Large wear holes along bottom of crotch area have formed in these boxers which used to be my favorite pair. I've only had them for a little over a year and wear them about every other week. They are washed on a delicate cycle with other merino wool items. Very disappointing considering the price. I have a Smartwool pair that have lasted twice as long with no wear holes.

N.F,

Thank you for taking the time to leave a review for our Lightweight - Acadian Men's Boxer Brief 100% Merino Wool. We're sorry to hear about the issue you experienced with holes forming after a year of normal wear and care.

We take the quality and durability of our products very seriously, and we're disappointed to hear that your favorite pair did not meet your expectations. Our team would love to gather more information and help find a resolution for you. Please reach out to us at info@minus33.com so we can assist you further.

In the meantime, we recommend following the care instructions on the label and avoiding any harsh washing methods to prolong the lifespan of your merino wool items. We also appreciate your feedback and will pass it along to our product development team for future improvements.

Thank you for being a valued customer and for bringing this to our attention.

Best,

The Minus33 Customer Service Team

Lightweight Merino Boxer Brief 3 Pack