Naturally Sustainable
Machine Wash & Dry
Naturally Anti-Odor
Breathable & Wicking
Soft on the outside, and tough as nails on the interior. It's no wonder we named our new line after the wolverine. With our new Micro Weight Woolverino fabric, your favorite boxers just got an upgrade. Improved fit, enhanced durability, and the same Merino Wool feel you've grown to love. The wolverine is out of the bag. Run for a pair while you can.
For a 100% Merino option in a versatile all-season weight, compare these lightweight merino wool boxer briefs for hiking, biking, running, and everyday wear.
Fabric
- Fiber Content: 84% Merino Wool, 12% Nylon, 4% Spandex
- OEKO-TEX® STANDARD 100 Certified
- Woolmark® Certified
- Knit: 145 g/m2 Micro Weight Jersey Knit
-
Microns: 17.5 Micron Fibers
- UPF Rating: 20
- Total Easy Care: Machine Wash and Dry
- Wool Source: Australia
- Imported.
Features
- Boxer Brief Style: Close-fitting with leg coverage to prevent chafing
- Covered Waistband: Merino next to your skin
- Flat Lock Seams: Prevents Chafing
-
Runs True to Size
- Weight: Size Large = 0.2 lbs. (91 grams)
- Style #: 1311
Uses
- Ideal Seasons: Spring, Summer, Fall, Winter
- Activities: Everyday Wear, Hiking, Camping, Biking, Running, Fishing, Hunting, Snowsports
- Temperature Recommendations: 30°F and up while active, 60°F and up while inactive - Learn More
Care
Washing and Drying Instructions - Learn More
- Turn Inside Out
- Machine Wash Cold: Gentle cycle with like colors
- Detergent: Mild or wool-specific
- Tumble Dry: Low heat
- Storage: Place in an airtight container when not in use for long periods of time
- Do NOT Use: Fabric softener or bleach!
Product Story
Woolverino
Woolverino's Core Spun Technology brings you a merino garment that is durable, athletically fitted and high-performing. Warm when you need it. Cool when you don't. It's PFAS-Free Nylon inner core offers strength, elasticity, resiliency, and durability. Merino Wool outer sheath provides insulation, moisture-wicking, and UV protection.
Our Guarantee
- 30 Day Satisfaction Guarantee - Return Policy
- 1 Year Warranty
- Extended 2 Year Warranty with Registration - Learn More
- New Hampshire, USA Customer Service
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)
Activity Level
Benefits of Merino Wool
Runs extremely small, ordered a large but it fits like a tight medium everywhere that matters, and I can't even explain why it would be this bad because the microweight 145 briefs in large are perfect.
All I ever wear. Extremely comfortable and durable.
Good morning Jeffrey,
We're delighted to hear that you love our Microweight Men's Wool Boxer Briefs! We strive to provide the best quality products for our customers. Thank you for choosing Woolverino!
Linda
Minus33 Customer Service Team
My favorite for hiking.
We're delighted to hear that you love our Microweight Men's Wool Boxer Briefs! We strive to provide the best quality products for our customers. Thank you for choosing Woolverino! Happy Trails!!!
Linda
Minus33 Customer Service Team
- These will keep you warm, cool, dry, and comfortable in both hot and cold weather.
- These are the best underwear I have ever owned.
- Super soft and comfortable. Excellent moisture wicking and zero chafing.
- 5 stars: 21 (84%)
- 4 stars: 2 (8%)
- 3 stars: 1 (4%)
- 2 stars: 1 (4%)
- 1 star: 0 (0%)
Runs extremely small, ordered a large but it fits like a tight medium everywhere that matters, and I can't even explain why it would be this bad because the microweight 145 briefs in large are perfect.
All I ever wear. Extremely comfortable and durable.
Good morning Jeffrey,
We're delighted to hear that you love our Microweight Men's Wool Boxer Briefs! We strive to provide the best quality products for our customers. Thank you for choosing Woolverino!
Linda
Minus33 Customer Service Team
My favorite for hiking.
We're delighted to hear that you love our Microweight Men's Wool Boxer Briefs! We strive to provide the best quality products for our customers. Thank you for choosing Woolverino! Happy Trails!!!
Linda
Minus33 Customer Service Team
Bought these for wool qualities, particularly the claimed lack of odor. Have only had a week but put them to the test. I wear natural fabric briefs only once and wash due to odor. I just wore these for a full workweek and only now are they exhibiting faint smells. So it’s true. The fit has been perfect so now I only have to see how long they last…
Unrivaled in undergarments. These will keep you warm, cool, dry, and comfortable in both hot and cold weather. I wear these for cross country biking. I have biked 1755 miles this year with over 60,000 ft in elevation gain and I only wear Minus 33 Merino boxers. The best base layer for 100+ kilometer rides.
Wow—thank you for the incredible review! We’re honored to hear our Merino boxers have been with you for so many miles and climbs. It’s great to know they’re keeping you comfortable through all your rides, no matter the distance or conditions. Here’s to many more kilometers in the saddle! ♂️
Thought long and hard about buying these wool underwear. I have tops and love them so I bought two pair of bottoms and they are very cool in 90 plus heat very comfortable, no bunching or climbing or sticking. Don't wait any longer to buy your self a pair or two. I will be adding more in the future. The waistband is soft.
Thank you for taking the time to leave a review for our Microweight Men's Wool Boxer Briefs Woolverino. We are thrilled to hear that you are enjoying the cool and comfortable benefits of our merino wool underwear, especially in hot temperatures. We are glad that you took the leap and purchased them and we appreciate your loyalty to our brand. We hope to continue providing you with high-quality products in the future. Happy adventuring!
Best,
The Minus33 Team
Bought them for bikepacking
These briefs were a perfect base layer for a road race on a hot day. Super soft and comfortable. Excellent moisture wicking and zero chafing. This is the best of all the wool brands I've tried over 20+ years.
Thank you for taking the time to leave such a positive review for our Microweight Wool Boxer Briefs. We are thrilled to hear that they were the perfect base layer for your road race, providing a comfortable and moisture-wicking experience. Our team takes great pride in creating top-quality products and we are happy to know that we have exceeded your expectations. Thank you for choosing us and we hope to continue providing you with exceptional products in the future.
Husband loves the fit and feel of these briefs.
We're delighted to hear that your husband loves the fit and feel of our Microweight Men's Wool Boxer Briefs! We strive to provide the best quality products for our customers. Thank you for choosing Woolverino!
Great product but they are a bit too long. I want lightweight wool to wear in summer. The waist is just right but if I pull them up to be snug they go ever my belly button and are still not far above my knees. I roll the waist band down a few times so it’s actually around my waist
Thank you so much for your feedback! We're really glad to hear the waist fits well and that you’re enjoying the product overall. It sounds like the length wasn’t quite what you were expecting, especially for summer wear. Rolling the waistband down is a clever solution, but we understand that a better fit off the rack would be ideal.
We truly appreciate you sharing your experience—it helps us continue to improve our designs. We’ll be sure to pass this along to our product team for consideration in future updates. If there's anything else we can help with or if you'd like assistance finding a style that might suit your needs better, feel free to reach out anytime!
Sierra S
Minus33
I bought these for my husband as a gift as he is trying to slowly shift over to clothes made of natural fibers. He loves them so far. Says the fit is great and doesn’t make him feel too hot or sweaty. He is very active so we’ll see about wear and tear as time goes on.
Hi Wallace! Thank you for taking the time to leave a review. We're so glad to hear that your husband is enjoying our Microweight Wool Boxer Briefs. It's great to know that he finds the fit comfortable and that they don't make him feel too hot or sweaty. We hope that they continue to meet his needs as he stays active. Thank you again for choosing our Woolverino products. Stay Cool!
Kindly,
~Sue
Minus33
Bought these for my husband who was constantly searching for boxer briefs that didn’t ride up and he loves these! He wears them in the office, hiking, and hunting and always chooses these over everything else in his underwear drawer. These wash well and keep their shape. Will be buying more!
Kim,
Thank you for taking the time to leave such a positive review! We are thrilled to hear that our Woolverino Micro Weight Boxer Briefs have become a staple in your husband's wardrobe for both everyday wear and outdoor activities. Our team takes pride in creating high-quality products that are both comfortable and durable. We appreciate your support and look forward to providing you with more of our Woolverino products in the future.
Best,
-Steven D
Best boxers ever! These are all I wear.
Loved them
I have been wearing underwear for a long time. Trust me. These are the best underwear I have ever owned. If I could afford it, I'd replace ALL my existing underwear with the micro weight wool boxers.
Al,
We are thrilled to hear that you're enjoying our Micro Weight Woolverino Men's Wool Boxer Briefs! We take great pride in providing high-quality products, and we are honored to have your vote for the best underwear you have ever owned.
We completely understand the desire to replace all your existing underwear with our Woolverino boxers. While we cannot promise anything, we do have sales and promotions throughout the year that may make it more affordable for you to do so. Please keep an eye out for future deals, and thank you for choosing our brand.
Wishing you comfort and satisfaction always.
-Steven D
Love the fit and the length, especially in the winter months. Like other wool products, they don't stink when out in the field for days on end and can be cleaned and dried relatively quickly.
That said, my oldest pair are almost 2 years old and have worn completely through along the bottom seam. I thought the fabric blend would make them last longer. I don't think anybody has figured out how to make wool underwear that lasts, which is a bit disappointing for the price, but not unique to Minus33.
Excellent!
Hands down the best underwear I have ever owned. I bought them for hunting season and now they are the only ones in my drawer!
Thanks for the great review. We're glad the Woolverino Men's Wool Boxer Briefs - Micro Weight are a staple for you!
-Katie P.
Great huggers.
I live in Minnesota, winters are cold and long. Summers are hot and moist. Since I discovered these boxer briefs a few years ago, they have been my GO TO undergarments for all seasons. I have tried other merino underwear (Icebreaker, Duckworth, Smartwool) and these are by far the most durable and comfortable. 5 stars all day long.
Mark,
We are happy to hear that our Minus33 boxer briefs are your 'go to' undergarment for all seasons. Thank you for this awsome review!
-Melinda W.
I just got these in and they are just as soft as the 100% wool but more roomy. I'm a fan!
Kelly,
We are happy to hear that you're enjoying your Minus33 Woolverino Boxer Briefs! The Woolverino line has some of my personal favorite items included in it and I agree that they are just as soft as our 100% wool items as well!
-Steven D
I gave these boxers a three star review, because of the fit. However, take it with a grain of salt, as I’m a weird body type. I’m a bit on the short and stout side, so it’s very rare that anything fits me properly. I followed the sizing chart on the site, but found them high very high waisted and saggy around the butt area, which would likely cause chafing during a long run or multi-day backpacking trip. I got them because I read a review that said they helped prevent thigh chafing (the short/squat man’s nemesis). This part held true. Though I had some annoying fabric bunching up around my butt, the leg portion stayed in place and kept my thighs from chafing.
Since they are underwear, and I assumed not returnable, I treated them pretty rough, right out of the box. I washed and dried them on high heat several times and they didn’t shrink or fall apart. I wore them for multiple days for hikes and runs and they held up just fine. My wife didn’t complain about my funk, so the merino wool anti microbial quality is pretty good too.
Overall, they’re a decent product, just be sure about your body type. I also have a lot of other Minus 33 products that have lasted for years and they’re really good products. It was just a bit of a bummer to spend 4 times more cash than I have ever spent on underwear to find that I can’t really wear it.
I bought two pair for September elk hunting when it's hot. All the great merino-isms (don't smell, comfy, etc) but have been more resilient than standard merino boxers regarding wear and tear.
I'll be buying another pair to try at some point, I accidentally bought one size larger than needed, other than that I like it.
Glad you are enjoying them! Thank you for your review.
What is the inseam length?
I checked the measurement on the size Large since it is in the middle of our sizing. The inseam on the Large is 8inches.


