best merino wool underwear boxer briefs
A woman models the microweight merino wool women&
Black high-waisted compression shorts worn by a model, shown from a side profile view. merino wool underwear boxer brief
Black high-waisted compression shorts with a white MINUS33 brand logo on the waistband, shown on a model against a white background. Merino wool boxer brief
A woman models the microweight merino wool women&
A woman models the microweight merino wool women&
A woman models the microweight merino wool women&
A woman models the microweight merino wool women&
A woman models the microweight merino wool women&
A woman models the microweight merino wool women&
A woman models the microweight merino wool women&
A woman models the microweight merino wool women&
A woman models the microweight merino wool women&
A woman models the microweight merino wool women&
A woman models the microweight merino wool women&
Styled front three-quarter view of a female model wearing slate blue microweight merino wool boxer briefs with a five-inch inseam and woven elastic waistband
Natural merino wool women&
Natural merino wool women&
Natural merino wool women&

Microweight 145 Women's Boxer Briefs Woolverino

Regular price$44.99
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Color
Size
Size chart

Measurements

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




Women's Clothing Size Chart


Size USA Size Chest (in) Waist (in) Hip (in) Shirt Length (in) Inseam (in)
XS 2 32-33 24-25 34-35 23.5-24.5 26-29
S 4 to 6 34-35 26-27 36-37 24.5-25.5 28-30
M 8 to 10 36-38 28-30 38-40 25.5-26.5 29-31
L 12 to 14 39-41 31-33 40-42 26.5-27.5 30-32
XL 16 to 18 42-43 33-35 43-44 27.5-28.5 30-32
2X 20 to 22 44-45 35-37 44-45 28.5-29.5 30-32
3X 24 to 26 46-47 37-39 46-47 29.5-30.5 30-32



Women's Petite and Long Bottoms Size Chart


Size USA Size Waist (in) Hip (in) Inseam (in)
SP 4 to 6 26-27 36-37 26-28
ST 4 to 6 26-27 36-37 31-33
MP 8 to 10 28-30 38-40 27-29
MT 8 to 10 28-30 38-40 32-34
LP 12 to 14 31-33 40-42 28-30
LT 12 to 14 31-33 40-42 33-35

 


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.

Hip: Measure the circumference around the fullest part of your hips.

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.





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

running up a rock slope wearing a merino sun hoodie and merino wool pullover and wool sweater

MICROWEIGHT MERINO WOOL

  • 145 g/m
  • 84% Merino Wool, 13% Nylon, 4% Spandex 
  • Tested safe against over 1000 harmful chemicals including PFAS
  • Machine Wash & Dry
  • UPF 20

Our microweight Merino wool is our lightest and most breathable fabric. It’s designed for high-output activities in warm to hot conditions. Perfect for hiking, running, biking, and everyday wear when you need sun protection and moisture management without extra bulk. Our Microweight fabric also works great as a base layer in spring and fall. You can learn more about our different Merino fabric weights here.

Temperature (°F)

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0°-30°
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60°-90°

Activity Level

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  • 5 stars: 33 (83%)
  • 4 stars: 2 (5%)
  • 3 stars: 4 (10%)
  • 2 stars: 1 (3%)
  • 1 star: 0 (0%)
B
Brenda

Soft and nice. Washed well. I am a bit concerned that when I pulled them on, even gathering gently, I thought I heard a couple of snaps (threads breaking?). I couldn’t see any issues though so hopefully all is well.

C
C Magnan (Norwood, US)
Lavender / XL
Height: 5'3"
Weight: 179
Primary Activity: Casual / Lifestyle
Back for another!

Back for another color! I purchased a black pair of briefs and a gray pair of boyshorts. The briefs continue to be my favorite so I bought another pair in purple. So happy to see new colors!

Hi C M! We're so happy to hear you love our briefs and are excited about the new colors. Thanks for your continued support! Thank you so much for coming back for another pair and for sharing your feedback! We’re thrilled to hear that our Microweight Boxer Briefs have become your favorite go-to style and that you’re loving the new purple colorway.

We really appreciate your continued support of Minus33 and hope your new pair treats you just as well!

Cory & the Minus33 Customer Care Team

G
Gail

Great fit and fabric. High quality.

Hi Gail,

Thank you for taking the time to leave a review for our Microweight Woolverino Women's Boxer Briefs. We are thrilled to hear that you are satisfied with your purchase and that the boxers have met your expectations. Our team takes pride in creating comfortable and breathable products that cater to different body types and needs.

Thank you for choosing our brand and we look forward to serving you again in the future. Have a great and safe 4th of July!!

Linda
MInus33 Customer Service Team

A
Anonymous (Portland, US)
Black / L
Height: 5’4”
Weight: 165 lb
I’m about to order a larger size, these run a bit

Great for under dresses, good length to avoid thigh rubbing, light weight. I’m about to order a larger size, these run a bit small in the waist band (large is a bit small for my 5’4” 165 lb pear shape).

Thanks for your feedback Kathy,

We're glad you find the briefs comfortable. Hopefully sizing up will give you the perfect fit. Let us know if you need any help! Have a happy and safe 4th of July!!

Linda
Minus33 Customer Service Team

G
Gina (Rock Hill, US)
Black / S
Height: 5’4”
Weight: 128 lbs
Primary Activity: Casual / Lifestyle
Expectations met!

Expectations met! I’ve spent weeks searching for a wool product like this one and so excited it is as advertised! Material is soft, fits and stays put!!

G
Gina Quinzani (Brooklyn, US)
Black / XL
Height: 5'3"
Weight: 130
Primary Activity: Casual / Lifestyle
I ordered these because they had the highest wool

I ordered these because they had the highest wool content I could find. They're not bad but I've been looking to find a pure wool, heavier weight, covered elastic pair like the (nameless) ones I bought 20 years ago. I still have them and they are the best.I know from experience the elastic will stretch out way too fast there by rendering them all but useless. I'll wear them and like I said they're good enough but they were too expensive for what they are.
I knew what I was ordering so that's on me but today's quality is not good. Also, my 20-year-ago pair were size small and they still fit. These are XL and they also fit. Usually that kind of sizing change works in reverse. I wish these were better.

S
Sandra H (pro ski instructor (and resident of the icebox of America) (Eau Claire, US)
Black / 2X
Height: 5’10”
Weight: 200 lbs
Primary Activity: Snowsports
Wool boy short undies for women??? They are a “must have”!

Yep, I searched the web for “wool underwear” to wear while skiing, as my bum is always cold, and was beyond excited to see -33, a tried and true brand in our home, makes the PERFECT design for my needs!!!
I ordered 2 pair, they fit perfectly based the size guide, the bands are not constricting and they are SO comfy!
I am thrilled to add a natural layer of material between my skin and the synthetic outer layers and have placed an order for a couple extra pair to wear at home instead of limiting them to the ski hill!

A
Anonymous (Germantown, US)
The cut is *low*

The cut is *low*, at least for the larger sized folks with some dump in their trunk. The band only goes up to a couple inches below my belly button, not my waist, so it feels more like a hip hugger. The band is also a bit narrow & tight so it digs into my guts and causes muffin topping / indigestion. The sizes seem to run a bit small.

A
Anonymous (New Bedford, US)
Black / L
Height: 5”
Weight: 140
Primary Activity: Hiking
So glad I found these

So lightweight, soft and comfortable, great for preventing chafing, love that they can go in the dryer

That is wonderful to hear! We are so glad you found these. We designed them to be soft, comfortable, and great for preventing chafing, so it's awesome that they are working perfectly for you! And yes, the easy care (hello, dryer!) is definitely a bonus. Thanks for sharing your feedback!

A
Anonymous (Chicago, US)
Black / L
Height: 5’9”
Weight: 137 lbs
Primary Activity: Hiking
Comfy undergarment/shorts

I bought this for the purpose of looking for a very lightweight underwear that is long and can serve as a pair of shorts under long tshirts or tunics for hiking. It os serving it’s purpose well. I am normally small to medium. 5’9”, 137lbs regular built. Wide waisted. And i picked XL to make it roomy around my thighs. It works perfectly well. Not too loose nor tight. Thank you!

Thanks so much for sharing your experience! We’re happy to hear this piece works perfectly for your hiking needs and that sizing up gave you just the right balance of comfort and fit. Your feedback will be really helpful for others looking for the same lightweight versatility. Thank you for being part of the Minus33 family. Happy Adventuring!

B
Brandy

Perfect fit, and comfy

B
Brandy

Perfect fit, and comfortable

A
Anonymous (Universal City, US)
Olive Drab Green / 2X
Primary Activity: Hiking
Awesome -yes, even in Texas!

These are the first underwear I have owned that actually manage to keep me dry! I have hyperhydrosis, so it's always a struggle to stay dry and avoid fungal rashes. Thanks!

Thank you so much for taking the time to leave a review on our Microweight Boxer Briefs. We're thrilled to hear that they've helped keep you dry and comfortable, even in the Texas heat! We're always happy to provide products that make a positive impact, and we're glad to have helped with your hyperhydrosis. Thanks for being a part of the Minus33 Family!

T
Taniarene (Hillsboro, US)
Height: 5'3"
Weight: 127
Primary Activity: Casual / Lifestyle
I bought two pairs to test, and I'm coming back

I bought two pairs to test, and I'm coming back for more. I'm 5'3", 127 lbs, muscular, but fighting that menopause muffin top.. I've got a booty, but not a dump truck. These are super comfortable for me. They fit my waist without compressing it. The legs stay in place and don't ride up. They are breathable and perfect under dresses, allowing me to move and not worry about who I'm flashing. Worn under shorts, on hot days, I find the boxers to be too warm on my legs, so I opt instead for the boy shorts. Check those out too.. I recommend both.

Taniarene,

Thank you for taking the time to leave a review for our Microweight Woolverino Women's Boxer Briefs. We are thrilled to hear that you are satisfied with your purchase and that the boxers have met your expectations. Our team takes pride in creating comfortable and breathable products that cater to different body types and needs.

Thank you for choosing our brand and we look forward to serving you again in the future.

-The Minus33 Team

A
Anna (Providence, US)
Height: 5'3"
Weight: 145lbs
Primary Activity: Snowsports
Not for those with junk in the trunk...

5 stars for this product existing - these are the ONLY women's merino boxer briefs that seem long enough to not ride up, I have looked everywhere - but 1 star for the fit. They are medium-high rise in the front (just below my belly button), but ultra low cut in the back (bending over would be quite revealing). They literally fit the same backwards as forwards, I checked! I originally ordered a medium but they didn't cover my posterior, so I sized up to a large and they have the same problem - slightly exacerbated because the looser waistband makes em more apt to fall down. PLEASE change the cut to be lower in the front and higher in the back, and I'll order one in every color.

Hi there! Thank you for taking the time to leave a review. We appreciate your feedback and are glad to hear that these boxer briefs are the only ones that stay in place for you. We apologize for any inconvenience with the fit and will pass along your suggestions to our design team. In the meantime, please feel free to reach out to our customer service team for assistance with sizing or any other concerns. We value your support and hope to provide a better fit for you in the future. Thank you for choosing our Microweight Women's Boxer Briefs!

H
Hannah (Grand Rapids, US)
Black / L
Height: 5'9
Weight: 145
Primary Activity: Biking
Love these

Love these. Inseam is long enough, super comfortable and provides good coverage

We're so glad to hear that you love our Microweight Women's Boxer Briefs. We strive to provide comfortable and high-quality products, and we're happy to hear that we met your expectations. Thank you for choosing Woolverino!

J
Jill (Charlotte, US)
Height: 5’8”
Weight: 140
Primary Activity: Workwear
Trust me you want them

Bought 1 pair in the fall to test out and fell in love so I got 2 more for my busy spring season. I work 10-12 hour days with half of that outside in the Texas heat. Most comfortable underwear I’ve ever owned. No chafing, so quick to dry, I have no complaints.

Jill,

Thank you for taking the time to leave such a positive review! We are delighted to hear that our Microweight Women's Boxer Briefs have exceeded your performance expectations and provided you with comfort during your busy days. We are happy to be a part of keeping you cool and comfortable in the Texas heat. Thank you for choosing our product and we hope to continue providing you with exceptional quality in the future.

Best,

Minus33 Customer Service

S
StellaDeOro (Overland Park, US)
Primary Activity: Hiking
These are so comfortable

These are so comfortable. I got them to go on a backpacking trip to Yosemite, and Mt. Whitney. Fell in love with them, and now wear them daily. I like the longer boxer's as they don't ride up my thighs and then cut off my circulation. I will be very upset if they ever discontinue these three panel long boxers. Definitely made for a woman's body.

We're thrilled to hear that our Microweight - Women's Boxer Briefs were perfect for your backpacking trip and have become a daily staple for you. We understand the importance of a comfortable fit, and we're glad our longer boxer briefs were able to provide that for you. We have no plans of discontinuing them anytime soon, so you can continue to enjoy them for a long time. Thank you for being apart of our Minus33 family!

A
Amy (Saint Paul, US)
I love them, however..

I absolutely love these boxer briefs for women.. I have about 4 pairs now and it's been about 2 years. I also have a different brand of boxer briefs. My upper thighs rub together, and what I have found out is the Minus 33 brand wears out quickly in the upper thigh area. All of my boxer briefs from Minus 33 are like that. For the price point, I cannot afford to buy new underwear every year in a half to 2 years. I was hoping these would last longer. (The other brand is holding up great, but they are not wool).

Hi there Amy!

Thank you so much for taking the time to leave a review for our Microweight - Women's Boxer Briefs Woolverino. We're glad to hear that you love them!

We understand your disappointment with the upper thigh area wearing out over time. We apologize for any inconvenience this may have caused. Our goal is to provide high-quality products that last, and we will definitely take your feedback into consideration for future improvements.

We appreciate your loyalty to our brand and hope that you continue to enjoy the comfort and benefits of our boxer briefs. If there's anything else we can assist you with, please don't hesitate to reach out to our customer service team. Thanks again for your support!

Happy Adventuring!
Sierra S
Minus33

E
Elizabeth Eidal
Height: 5'6"
Weight: 150
Primary Activity: Running
Comfortable

Comfortable. Soft. Breathes in humid weather. Easy eash and dry.

H
Heidi (Portland, US)
Dang, they do ride up!

Based on the reviews, I was excited to receive my pair of women's boxer briefs! I'm a professional arborist and hunting for a pair of wool briefs to wear under my chainsaw pants and keep my bits happy all day. Wearing the briefs for a day around the house as a test proved positive, super cozy and fit as expected. First day wearing them to work, I was grateful they were so soft because they spent a lot of time bunched in parts I'd rather keep free of obstructions. These will be saved for lounge days but unfortunately did not fit the original purchase goal.

Hi Heidi,

Thank you for taking the time to leave a review for our Micro Weight - Women's Boxer Briefs Woolverino. We're sorry to hear that they did not meet your expectations during work. We understand the importance of comfort, especially for a profession like yours. We'll take this feedback into consideration for future improvements. In the meantime, we're glad to hear that they are still cozy for lounging days! If you have any further concerns, please don't hesitate to reach out to us. Enjoy your day Heidi.

Best,

~Sue
Minus33 Team

A
Amart

These appear to be hipster, below the waistline. Is this correct? Frankly, I love the Calida fit, at the waist. I just hope to find that fit in wool.

Minus33 Merino Wool Clothing

Amart,

Yes, the Micro Weight - Women's Boxer Briefs Woolverino is a hipster, below the waistline.

-Minus33

Women's Merino Wool Boxer Briefs - Microweight