Our shortest length of underwear, the brief is made with luxurious 17.5 micron merino wool and real silver. The custom double knit fabric weighs 200gsm and has a terry finish on the inside that is incredibly comfortable and a dream to wear. Silver yarns in the fabric are permanent and neutralizes odor causing bacteria. Combined with the natural anti odor performance of merino, this product takes it up a notch so you can get more wears between washes (when you need to). The Briefs do not have the silicone grip found on our Boxer-Brief.

SilverAir Merino Wool Brief
Graphite Grey
Jet Black 2
    • SilverAir + Merino Wool fabric prevents odor build-up 
    • Made from 17.5 Micron Merino Wool
    • Horizontal fly provides easy access
    • 90% Merino Wool, 5% Metallic, 5% Spandex (200 gsm)
    • Manufactured in China

    Measurement Guide



(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
5.0 Based on 6 Reviews
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A Y Athletics Customer
Matthew E.
United States United States
I like them

Very comfortable. Just the right hold. The fly is a great design.

Martin F.
Japan Japan
Wonderful undies!

I have never bought high quality underwear before, but I decided to try these out and I am very impressed with the comfort and fit of them. They barely feel like they are there and I really love them.

Philip T.
United States United States
Best boxer briefs ever! Nothing compares!

I have searched for years for comfortable boxer briefs that don’t ride up. These are the best ever. Super comfortable fabric, great feel with warmth but not hot. Really like the antibacterial property of the silver and the SmartGrip silicone inside the thighs keep them from riding up. Excellent design! These are the only underwear I will wear. To top it off the customer service is impeccable! Thanks Y Athletics. Please keep up the great work.

Brian C.

Comfortable and material feels great. Will definitely be re-ordering!!

Lawrence C.
Super awesome... I've said it before!

This is my second purchase from Y Athletics and I was stoked to see them expand their line up of underwear, I'm a briefs wearer in summer and thats what I brought a couple of pairs of... AND they have not disappointed. I'll be back shortly to stock my wardrobe! Lawrie