A high performance boxer-brief made with luxurious 17.5 micron merino wool and real silver. Our custom double knit fabric weighs 200gsm and has a terry finish on the inside that is incredibly comfortable and a dream to wear. The silver neutralizes odor causing bacteria and takes the natural anti odor performance of merino to the next level. A silicone grip system prevents the legs from riding up or bunching. The 2.0 version now features a gusset reinforced with nylon that is more durable against abrasion.

SilverAir Merino Wool Boxer Brief 8"
SilverAir Merino Wool Boxer Brief 8"
Jet Black 2
Jet Black 2
Jet Black 2
Jet Black 2
Jet Black 2
Heather Grey
Heather Grey
Heather Grey
Jet Black 1
Jet Black 1
Graphite Grey

Boxer Brief 8" Flyless

38 reviews

$ 40.00

  • Jet Black 2
  • Graphite Grey
  • Heather Grey
  • Jet Black 1
  • S
  • M
  • L
  • XL
  • XXL
    • Silver and Merino Wool prevents odor build-up 
    • SmartGrip™ System helps keep leg bands in place 
    • Made from 17.5 Micron Merino Wool
    • Inseam length: 8"
    • 90% Merino Wool, 5% Metallic, 5% Spandex (200 gsm)
    • Manufactured in China


(based on body measurement in inches)


If you don't love your first pair, you can return it within 30 days of purchase for a full refund or a different size.


17.5 Micron Ultrafine Merino Wool. No Compromises.

For the base fabric of this underwear, we sourced ultra fine 17.5 Micron New Zealand Merino Wool for it's natural ability to regulate temperature and resist odor, while having a buttery soft hand feel that is dry to the touch. SilverAir metallic yarns neutralize bacteria and reinforce odor-control. Finally, a hint of spandex is added so the underwear does not lose it's shape over time. The waistband is constructed with a double-soft nylon that feels like a cloud on the skin and will not leave any marks.

SilverAir Shirt


Taking odor control to a whole new level.

Merino wool is naturally resistant to odor-causing bacteria, but silver actively neutralizes any bacteria it comes into contact with. That's why we infuse our SilverAir technology into the underwear to give it the best possible anti-odor performance in the market.

SilverAir Sock


A grip system that prevents ride-up

Inspired by grip systems in high-end cycling apparel, we designed a custom grip using soft silicones that you barely feel against your skin but which creates just enough resistance for the leg band to stay in place.

SilverAir Shirt

SilverAir Merino Wool Underwear

SilverAir Merino Wool Underwear

SilverAir Merino Wool Underwear

SilverAir Merino Wool Underwear

SilverAir Merino Wool Underwear

SilverAir Merino Wool Underwear

Customer Reviews
4.6 Based on 38 Reviews
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A Y Athletics Customer
Chris T.
United States United States

WOW! Put on my new, straight out of the package,Y Athletics Silverair Merinos; did two hours of hard, sweaty yard work and was amazed at how dry and comfortable my boxer-briefs were, compared to my drenched shirt! I will have to get some of your t's. Great product.

roy h.
United States United States
Great undies!

Had a pair on a 42 day holiday that really stood up to multi day wear. A big plus is they are quick drying if you hand wash while on the road. Plus, they are hella comfy.

Jazz, J.
United States United States
Very comfy, ready for winter!

These are great, they’re comfortable and don’t bunch up or ride up. Only downside is they dont have a fly! Please make some with a fly!

Randy H.
United States United States
The Awesomeness continues!

I added a couple more pair to my collection last week. I'm slowly replacing the TJ's I have, as there is simply NO comparison!

Nicholas C.
United Kingdom United Kingdom
Best boxers ever

I’ve been a professional athlete for years and these are simply the best tight boxers I’ve ever worn