Men's Nuyarn® Merino Wool Tech Boxer Brief

$41.96 $55.95
Size Guide
Best Used For:

Daily. Hiking. Camping. Travel. Casual. Running. Hunting. Outdoors

UnCover all your bases with the Wūru® Men’s Merino Wool Tech Boxer Brief, now featuring  Nuyarn® and Made in the USA. Featuring flatlock seams and a horizontal fly - Support where you need it, access when you want it!

The World’s First Performance Wool. Nuyarn® offers a proprietary spinning technology that releases the natural performance characteristics of wool like no other. Making the once impossible, possible.  

Technology you can feel!


Product Weight Medium: 3oz

Fabric: 85% Merino, 15% Nylon - 17.5 Micron

Fabric Weight: 125gsm (Equivalent warmth: 168gsm ringspun fabric)

Featuring Nuyarn® Technology

Knit in Vietnam at Bluesign® & Global Organic Textiles Accredited Facility

Made From: Non-mulesed Australian merino wool

Spun in an OEKO-TEX® Accredited Facility – Does not use environmentally harmful chemicals meeting or exceeding worldwide safety standards 


  • Handmade in the USA from premium Australian wool
  • Flatlock seams to eliminate chafing  
  • Horizontal fly -  Support where you need it, access when you want it
  • Naturally odor resistant and antibacterial.
  • Exceptionally soft Merino wool for pure comfort.
  • Blended with a touch of nylon for extra durability.
  • Made from sustainable and ethically sourced fabric.


Machine Wash Cold Gentle Cycle.  Do Not Bleach.  Tumble Dry Low (hang/flat dry for best results).  Cool Iron As Needed.  Do Not Dry Clean.

Maintain Your Merino

Machine Wash - Cold Gentle Cycle. 
Do Not Bleach. 

Tumble Dry - Low (hang/flat dry for best results).  

Cool Iron As Needed. 
Do Not Dry Clean.

Customer Reviews

Based on 11 reviews
DWS (Cumming, US)
Passed the test!

Took these on a 2 day backpacking trip as soon as they arrived. Muggy Tennessee days with 3K elevation gain and a full pack.

They wore perfectly, dried quickly, didn't ride up or bunch, and I was able to wear them both days including sleeping in them with no issues. I'm trying to get completely off petroleum clothing and these were just excellent. I was really surprised at how little of the sweat I even noticed even pulling big miles on trail. I am about to order several more pair!

Peter E. (Weston, US)

Super comfortable; nice fit (medium - I'm 5'8" 155lbs). Just got them and have only worn them a few times, so I can't speak to durability. I hope I don't screw them up by hot water washing and tossing in dryer!

Kira M. (New York, US)
Big hit with my husband!

I bought one pair of briefs for my husband as a gift. He loves them! He said he will be back for more himself. Kudos!

Kade W.
Falling apart in less then a I month

Comfy, but poorly made. Runs/tears where the body joins the waistband after only a few wears. Also, the fabric was pilling after only one wear. So much dirt being tougher than 100% merino, I’ve never had a pair of underwear fall apart this fast, and I have merino undies over a year old in better shape.

I’m sorry you’ve had a bad experience. We have just been made aware of an issue with the sewing machine with our manufacturing partner. It was damaging the fabric as it was sewing. While we've pulled all inventory from this production, this issue seems to be isolated to the Charcoal.

I echo your frustration and this is 100% unacceptable - We will connect with you to correct this.

Steve S. (Salt Lake City, US)
5 Day Elk Hunt

I just got back from a 5day elk hunt in Colorado at 10,000+ feet elevation. I wore your long sleeve top and briefs during the hunt. The top was wore all 5 days and switched out the briefs after 2 days. All I can say is thank you for making an amazing product. I was very impressed!