A high performance boxer-brief made with luxurious merino wool and fused with our SilverAir anti-odor technology. A silicone grip system prevents the legs from riding up or bunching. Perfect for travel but so comfortable you'll want to wear them every day.

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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"


$ 40.00

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

    Measurement Guide


We want you to love your gear and offer a try-on guarantee for your first pair of underwear. If you don't love it, let us know within 30 days of purchase and we'll send you a different size or take it back and issue a full refund.


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

Customer Reviews

4.6 Based on 33 reviews
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Wayne R.


A tad expensive but they are great fitting. $200 for 4 pair is a little much though. You need to work on bringing that price down.

Randy H.
United States

My New Favorites!

I've been a Tommy John person for about 2 years. These seriously kick their butts! Much softer, and way more comfortable. I'll be switching out all of mine over the next few months. I went on a backpack trip and no issues at all for 2 days of hard work. Great Product!

Noel J.

Kickstarter Years

I bought one of each color back when they launched on June 28th, 2016. These 3 have been the powerhouses of my wardrobe and have held up to camping, work, and nearly everyday use since then and the only ones to have remained almost like new. I'm going to slowly start replacing the rest with Y Athletics to eventually have only a wardrobe/undergarments of this high caliber quality. My only regret is that I'm not sure how to get sponsored by them! (Note: there is slight pilling on the band, but this is noted in their description and does not impair the use and is personally not a bother)

Curtis B.
United States

Great feel, no flap

These were replacements for a previous pair that developed a hole. These don’t have a flap, which I prefer. They fit great & Y Athletics are my favorite underwear.

Randy H.
United States

Seriously damn nice!

I'm loving these a hell of a lot. I'll be buying more of these very shortly. I tried a pair to see how I liked them - Slam dunk!!!