Start your layering system off right with Merino wool underwear. Choose from several styles, including two lengths of Merino wool boxer briefs for him and Merino boy shorts, bikinis, thongs and bra tops for her.

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a close-up of a man wearing Ridge Merino boxer briefs

Built For The Active Lifestyle

Underwear is an essential part of the daily wardrobe, so why not have softest, comfiest fabric where it matters most? Our Merino wool underwear is thoughtfully tailored and designed to stay in place, during the most rigorous — or relaxing — activity.

a woman stands by a forest stream wearing Ridge Merino underwear

Nature's Fabric

In addition to being a natural, renewable, and biodegradable fiber, Merino wool offers unparalleled comfort and versatility resulting in the layers available. Merino wool regulates body temperature by releasing heat and keeping sweat away from your skin. It is also naturally antimicrobial, repelling bacteria that cause body odor to stave off stink.

a man wearing Ridge Merino boxer briefs sets up camp in a yurt

(m)Force Technology

Our Merino wool underwear features our exclusive (m)Force™ Nylon Core Technology. We engineered super-soft Merino next to skin to achieve unmatched comfort and performance and wrapped it around a continuous nylon filament for improved strength. The result is a fabric that holds it shape, dries faster and lasts longer than 100% Merino at similar weights. This means our (m)Force fabrics have all the technical benefits of 100% Merino wool with the enhanced durability typically associated with synthetics.

Underwear Reviews

Take it from our customers.

"They’re AMAZING! Perfect fit, don’t bunch up, and I love the performance of merino for long hikes. Also wore them bike packing and no chafe in the saddle!"

Robin P.

Ridge Boy Shorts Underwear

"Wore these during a ski trip where temperatures regularly dipped into -10s°F. They kept me warm and comfortable both on and off the slopes."

Jonathan C.

Merino Wool Boxer Briefs

"Using as shorts under short skirts. Not too long, not too short. Don't ride up. True to size. So much better than polyester."

Angela L.

Ridge Boy Shorts Underwear

"I took them on a camping ultra marathon relay weekend. I love the length, finally finding boxers that come down over my quads and don't roll up. So glad I found these!"

Gaelan S.

Ridge Long Boxer Briefs - 9 Inch

"I’ve never owned wool boxer briefs before, but I’ve already purchased another pair after wearing them for awhile. I haven’t had any riding up and forget I have them on, which is always the goal. Highly recommend!"

Jared K.

Merino Wool Boxer Briefs