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Women's Merino Bikini

4.5
Rated 4.5 out of 5 stars
56 Reviews
$40
$40
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Model is 5'10", has a 23.5" waist and is wearing size M

Women's Merino Bikini

4.5
Rated 4.5 out of 5 stars
56 Reviews
$40
$40

The most comfortable travel underwear for any trip. Made from superfine Merino wool, this lightweight underwear is breathable, super stretchy and luxuriously soft on your skin. 

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The most comfortable travel underwear for any trip. Made from superfine Merino wool, this lightweight underwear is breathable, super stretchy and luxuriously soft on your skin. 

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  • Light and breathable Light and breathable
  • Wicks moisture Wicks moisture
  • Machine washable Machine washable
  • Fast drying Fast drying
Fabric and Details
  • 60% Merino Wool,  34% Nylon, 6% Spandex
  • 290 gsm
  • Seamless Knit Fabric for all day comfort. 
  • Lightweight 
  • Fiber micron: Ultrafine 16.5
15 µm
16.5 µm
25 µm
Care instructions
  • Machine wash in cold gentle cycle
  • Wash with like colors inside out
  • Do not bleach 
  • Do not tumble dry 
  • Iron in low temperature 
  • Lay flat to dry in shade
Merino Care 101
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Everyday Comfort and Performance

  • Light and breathable Merino wool blend that is luxuriously soft and super stretchy.
  • Seamless Knit Fabric for all-day comfort.
  • Anti-odor and temperature-regulating.
  • Moisture-wicking fabric stays comfortable in any climate.

“The perfect T-shirt can see you through almost any situation, and Unbound makes a strong bid for the title with their chic Merino designs.”

"It's the most popular T-shirt in our Merino guide and well-loved by travelers. It's very soft and lightweight, and it packs down to a tiny roll."

“These tees have a sophisticated European elegance to them, thanks to both the material and design. Just looking at them makes you feel chic.”

“Between the flattering fit and the classic style, it's a great option for travel.”

"I may hold off on washing this T-shirt for another few weeks. It miraculously looks and smells like it was just cleaned."

Travel Leisure
WIRED
Forbes
Lonely Planet
Fast Company

"This is the perfect base layer as it’s super lightweight and is anti-wrinkle and moisture-wicking. This can quickly become your new closet staple at home and on the road."

"I may hold off on washing this T-shirt for another few weeks. It miraculously looks and smells like it was just cleaned."

"Lightweight and breathable, this shirt has a perfectly soft feel. The thin material is moisture-wicking, making this great for layering or wearing on its own."

"Unbound Merino sits at the intersection of travel gear and luxe knitwear, offering wool garments in timeless styles. They use superfine premium Merino wool that’s Woolmark-certified."

"This shirt's wool fibers lock odor molecules within and only release them on washing — which means less washing and more wearing. That makes this the ultimate travel top."

Travel + Leisure
Fast Company
Conde Nast Traveller
Bustle
Refinery29

NATURE'S MIRACLE FABRIC

Every Merino wool fiber has a waxy coating called Lanolin, which helps wick moisture away from your body, and act as a safeguard against odor-causing bacteria. This is what allows our Merino wool to stay breathable and dry while smelling and feeling fresh, no matter what you put it through.

Light & breathable

Light & breathable

Wicks moisture

Wicks moisture

Never Smells

Never Smells

Machine Washable

Machine Washable

NATURE'S MIRACLE FABRIC

Light & breathable

Light & breathable

Wicks moisture

Wicks moisture

Never Smells

Never Smells

Machine Washable

Machine Washable

SOFTER THAN COTTON

This wool isn’t like your typical itchy sweater. We only use superfine (16.5 micron) Merino wool, resulting in a luxuriously silky soft feel that’s lighter and more plush than your average Merino or cotton. And unlike most clothes, it'll also maintain its form over time and won’t get ruined after a wash.

Learn more about the benefits of Merino wool
Watch video
Natural Airflow Regulates Body Temperature

Natural Airflow Regulates Body Temperature

With Merino wool, your body heat can pass through the space between our woven superfine fibers, regulating your body temperature and keeping you cool & comfortable.

Cozy Softness

Cozy Softness

Modern spinning technology has made Merino wool the softest, most luxurious of all wool types. Perfect against your skin, the fibers will never itch or irritate, outclassing synthetic fibers.

EASY CARE

EASY CARE

You won’t have to wash this underwear much at all. However, when it comes time for a refresh, simply add it to your load at the cold temperature gentle setting and then lay flat to dry in shade.

ABOUT OUR WOOL

  • Sustainably sourced from independent, cruelty-free wool farms.
  • Woolmark® certified Merino wool means you can expect the highest standards related to fiber content, performance, color fastness, and dimensional stability.
Woolmark

sonica c.

The material is the best Merino wool I have owned to date. Couldn’t be happier.

sonica c.

ava b.

Replacing my entire wardrobe. I can only say the hype is real.

ava b.

Jamie F.

Can wear a dozen times without washing. Just hang on a hook to let sweat dry and it’s as good as new. This thing is magic.

Jamie F.

Perfect for Travel

YOU’LL PACK LIGHTER

YOU’LL PACK LIGHTER

With clothing that doesn’t smell after every use, you can pack less, allowing you to ditch the suitcase and travel with just a small backpack.

YOU’LL SAVE MONEY

YOU’LL SAVE MONEY

These days, most airlines are going to charge you for anything other than a carry-on. Start packing lighter and doing less laundry, and save your money for the real experiences.

YOU’LL SAVE TIME

YOU’LL SAVE TIME

Never check luggage or worry about airports losing your stuff. With fewer but better clothes you’ll blaze through airports like a seasoned pro.

What People Are Saying

4.5
Rated 4.5 out of 5 stars
Based on 56 reviews
Slide 1 selected
Total 5 star reviews: 42 Total 4 star reviews: 7 Total 3 star reviews: 3 Total 2 star reviews: 3 Total 1 star reviews: 1
How did you find the fit?Rated -0.3 on a scale of minus 2 to 2
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56 reviews
  • ES
    Erin S.
    Verified Buyer
    Reviewing
    Women's Merino Bikini Black / L
    I recommend this product
    Rated 5 out of 5 stars
    1/19/26
    Game changer

    I love these undies. Never in a million years did I think I would ever wear, let alone LOVE wool panties, but these are amazing. They are incredibly comfy, easy to wash and great for travel- I wore them 22+ hours on a plane and didn’t think about them once, which is amazing- to never get a wedgie on a long haul flight is a rare blessing for me. I will be ordering many more pairs. Can’t wait to try the bra!

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  • DH
    Deborah H.
    Verified Buyer
    Reviewing
    Women's Merino Bikini Black / M
    I recommend this product
    Rated 5 out of 5 stars
    1/18/26
    Comfy and natural

    I bought a small and medium both fit. I'm 5'4" 135lbs with a backside. The medium fit the best at my current heavier weight. I'm going on a trip to costa Rica and needed quick drying underwear and am used to organic cotton. I love these they fit better than the other top wool brand I also tried and I plan on upgrading when my cotton ones wear out. Can't wait to see how they hold up in August for my costa rica trip

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  • JK
    Jenn K.
    Verified Buyer
    Reviewing
    Women's Merino Bikini Black / L
    I recommend this product
    Rated 5 out of 5 stars
    1/18/26
    Feel great, look great

    Really happy with these - they feel amazing, look great, and wash and dry quickly (great for travel)

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  • CD
    carrie d.
    Verified Buyer
    Reviewing
    Women's Merino Bikini Black / L
    I recommend this product
    Rated 5 out of 5 stars
    1/8/26
    Super comfy

    These are very soft, comfortable and breathable. They don't ride up and are comfy for every day wear and exercise. I ordered one medium and one large. I actually like both. I prefer the large, but medium is also comfortable. I am 5'8" 150 lbs

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  • SL
    Stephanie L.
    Verified Buyer
    Reviewing
    Women's Merino Bikini Black / M
    I recommend this product
    Rated 5 out of 5 stars
    1/3/26
    Merino Bikini

    These are very nice underwear. When compared to other Merino wool underwear, it feels more sturdy. It is well constructed. There are no tags that rub up against your skin. They are stretchy so that they conform to your fit.

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