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Women's Merino Underwear

4.6
Rated 4.6 out of 5 stars
58 Reviews
£31
£31
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Women's Merino Underwear

4.6
Rated 4.6 out of 5 stars
58 Reviews
£31
£31

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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BUNDLE & SAVE
Bikini // 3 Pack Save £11

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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Why our customers
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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

4.6
Rated 4.6 out of 5 stars
Based on 58 reviews
Slide 1 selected
Total 5 star reviews: 44 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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58 reviews
  • JD
    Josephine D. N.
    Verified Buyer
    Reviewing
    Women's Merino Bikini Sand / L
    I recommend this product
    Rated 5 out of 5 stars
    1/24/26
    I now have 5

    I loved this underwear so much that I ended up buying 5 pairs in a month (3 were a bundle). Nice, sturdy weight to the fabric (not flimsy or lightweight), very very comfortable, keeps you dry when wearing during active wear. I sized up to a large based on reviews (I normally wear medium in most underwear brands), and it was perfect. I can’t wait to take them traveling as I think these will hold up well, and be temperature regulating for both warm and cold weather. Good to sweat in because they will stay dry, and good for the cold because they are a lovely thick fabric. I’d love to get the matching bra next when it comes back in stock in my size. I marked these as “runs small” since I sized up and they were perfect that way. I recommend.

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  • BH
    Breanna H.
    Verified Buyer
    Reviewing
    Women's Merino Bikini Black / M
    I recommend this product
    Rated 5 out of 5 stars
    1/24/26
    Fabulous!

    Love the matching setting. Doesn't retain any smell. Easy to wash on vacation.

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  • 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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