A high performance boxer-brief made with luxurious 17.5 micron merino wool and real silver. Our custom double knit fabric weighs between 200-220gsm 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 all new version 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
Jet Black 2
Midnight Blue 2
Midnight Blue 2
Graphite Grey
Graphite Grey
Monaco Blue
Racing Green

Boxer Brief 8"

$ 40.00

  • Jet Black 2
  • Graphite Grey
  • Midnight Blue 2
  • Racing Green
  • Monaco Blue
  • 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"
    • 80% Merino Wool, 10% Nylon, 5% Metallic, 5% Spandex (220 gsm) - Jet Black, Racing Green, Monaco Blue
    • 90% Merino Wool, 5% Metallic, 5% Spandex (200 gsm) - Midnight, Graphite
    • 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 47 Reviews
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Filter Reviews:
Peter C.
United States United States

xl not xl

the xl is the same size as my current large

A Y Athletics Customer
Vladimir P.
United States United States

Love it

Great fit! Thanks!

John B.
United States United States

Best Boxer Briefs on the market, worth the $$.

The product is awesome, never had a set of boxer briefs that stay in place as well, give odor protection and feel great. I have my 19 year-old son hooked on them too. On top of that Y-athletics customer service and appreciation is top notch. Only wish they would bring back the 8" without Fly version :)

Saxon S.
United States United States

SilverAir Merino Wool Boxer Brief 8" w/Fly

My favorite briefs for high intensity workouts. I won't use any other brand.

Jonathan G.
Canada Canada

Worth every penny

These are without doubt the best boxers I have every had. I can’t imagine going back to any other boxer again ever. Will be ordering more soon.