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Women's Merino Underwear Pack Builder
Women's Merino Underwear Pack Builder
The most comfortable travel underwear for any journey. Made from lightweight, superfine Merino wool, it’s breathable, ultra-stretchy, and luxuriously soft against your skin. With our Pack Builder, the more you pack, the more you save.
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Free delivery on all UK orders
The most comfortable travel underwear for any journey. Made from lightweight, superfine Merino wool, it’s breathable, ultra-stretchy, and luxuriously soft against your skin. With our Pack Builder, the more you pack, the more you save.
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The most comfortable travel underwear for any journey. Made from lightweight, superfine Merino wool, it’s breathable, ultra-stretchy, and luxuriously soft against your skin. With our Pack Builder, the more you pack, the more you save.
United Kingdom |
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Standard Delivery 2 to 3 weeks - FREE
Please note that international customers (outside of Canada and the United States) may be subject to taxes or duties upon delivery.
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International |
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USAFree Standard Delivery (2 to 6 business days)
CanadaStandard Delivery- 5 to 7 business days - FREE
Europe Zone 1Germany, Belgium, Croatia, Denmark, Estonia, Finland, France, Hungary, Ireland, Latvia, Luxembourg, Netherlands, Spain, Sweden, Switzerland, Poland, Portugal, Bulgaria, Greece, Italy, Malta, Austria, Cyprus
Europe Zone 2Iceland, Lithuania, Norway, Romania, Slovakia, Slovenia, Czechia, Gibraltar Standard Delivery ($200 and up) 2 to 3 weeks - FREE
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Australia, New ZealandStandard Delivery ($200 and up) 2 to 4 weeks - FREE
Japan, Hong Kong SAR, South KoreaStandard Delivery ($250 and up) 2 to 4 weeks - FREE
Malaysia, SingaporeStandard Delivery ($250 and up) 2 to 4 weeks - FREE
Rest of worldStandard Delivery 2 to 4 weeks - $19.99 |
RETURNS & EXCHANGES
We make it easy for you to try — and fall in love with — Unbound Merino.
You can return or exchange clothing purchased directly from unboundmerino.co.uk as long as it is unworn, unwashed, and in the original condition in which it was delivered. UK and international customers are responsible for return shipping costs, but a full refund will still be issued once the item is received and approved. We are happy to offer a full refund or exchange for any reason within 90 days from the delivery date.
Please note that exchanges are subject to availability, and a refund will be processed if the product you requested is unavailable. All socks and underwear purchases are final sale and cannot be returned or exchanged for sanitary reasons. Final Sale items can't be returned or exchanged. Delivery costs on the original order (including duties and taxes) are not refundable. Refunds are issued to the original payment method on the order, which may include gift cards if one was used.
Visit returns.unboundmerino.com to begin your return or exchange.
Once you start a return or exchange, please note you have 28 days to deliver the item back to us before the request expires. For orders delivered to the UK, we are unable to provide prepaid return labels at this time.
If you have any further questions, please contact us at help@unboundmerino.com
As featured in
What's included
Women's Merino Bikini
- 60% Merino Wool, 34% Nylon, 6% Spandex
- 290 gsm
- Seamless Knit Fabric for all day comfort.
- Lightweight
- Fast drying

Women's Merino Thong
- 60% Merino Wool, 34% Nylon, 6% Spandex
- 290 gsm
- Seamless Knit Fabric for all day comfort.
- Lightweight
- Fast drying

Merino wool is nature’s miracle
Doesn't Smell
Stays fresh and odor free for weeks.
Regulates your temperature
Breathable and insulating.
Dries fast
You’ll be dry and comfortable quickly.
Doesn’t wrinkle
It’s good to go whenever you need it.
MORE BUNDLE OPTIONS







3 Pack // T‑Shirts
Bundle and save. Choose 3 T-shirts in a variety of colors and styles.





5 Pack // T‑Shirts
Bundle and save. Choose 5 T-shirts in a variety of colors and styles.










Hoodie + T‑Shirt Bundle
Choose 1 Hoodie and 1 T-shirt. Available in a variety of colors.










Travel Trousers + T‑Shirt Bundle
Choose 1 Travel Trousers and 1 T-shirt. Available in a variety of colors.






2 Pack // Travel Shorts
Choose any 2 pairs of Shorts from 4 color options.










2 Pack // Merino Travel Trousers
Choose any 2 pairs of Travel Trousers. Available in a variety of colors.






2 Pack // Compact Travel Hoodie
Choose any 2 Travel Hoodies from 8 color options.






1 Pack Bundle
Choose 1 T-shirt, 1 pair of underwear and 1 pair of socks. Available in a variety of colors.






2 Pack Bundle
Choose 2 T-shirts, 2 pairs of underwear and 2 pairs of socks. Available in a variety of colors.








3 Pack Bundle
Choose 3 T-shirts, 3 pairs of underwear and 3 pairs of socks. Available in a variety of colors.








2 Pack // Button‑Up
Choose any 2 Button-Ups from 6 color options.







2 Pack // Long Sleeves
Choose any 2 Long Sleeves from 8 color options.






2 Pack // Polos
Choose any 2 Polos from 8 color options.






2 Pack // Boxer Briefs
Choose any 2 pairs of underwear from 10 color options.




2 Pack // Ankle Socks
Choose any 2 pairs of Socks from 2 color options.




3 Pack // Merino All Season Ankle Socks
Choose any 3 pairs of Socks from 2 color options.




5 Pack // Merino All Season Ankle Socks
Choose any 5 pairs of Socks from 2 color options.




10 Pack // Merino All Season Ankle Socks
Choose any 10 pairs of Socks from 2 color options.





2 Pack // All Season Crew Socks
Choose any 2 pairs of Socks from 2 color options.





3 Pack // Merino All Season Crew Socks
Choose any 3 pairs of Socks from 2 color options.





5 Pack // Merino All Season Crew Socks
Choose any 5 pairs of Socks from 2 color options.





10 Pack // Merino All Season Crew Socks
Choose any 10 pairs of Socks from 2 color options.
What People Are Saying
Be The First To Review
Your thoughts are important to us to keep improving our products
- SSSylvia S.Verified BuyerReviewingWomen's Merino Bikini Black / LI recommend this productRated 5 out of 5 stars8/11/25Perfect for hiking!
I reluctantly ordered one pair to see if they irritated my sensitive skin. Wore them on a hike with high temp and humidity. Love that they breathe! Very comfortable and they didn't irritate my skin. Ordered 3 more pairs for upcoming Camino hike. I also ordered the bra and love it. Good support. Hoping to order another bra before my trip. Unfortunately my size is currently out of stock.
How did you find the fit?Rated 0.0 on a scale of minus 2 to 2Runs Small True To Size Runs BigWas this helpful? - MCMichael C.Verified BuyerReviewingWomen's Merino Thong Black / LI recommend this productRated 5 out of 5 stars8/11/25Excellent quality
Superior comfort and style hope the make them in purple someday. Thanks very much
How did you find the fit?Rated 0.0 on a scale of minus 2 to 2Runs Small True To Size Runs BigWas this helpful? - VRVanessa R.Verified BuyerReviewingWomen's Merino Thong Black / MI recommend this productRated 4 out of 5 stars8/7/25Thong
Material is a bit thick and the mediums ate a bit tight. Hope they stretch out a bit. I was trying for a more seamless look
How did you find the fit?Rated -1.0 on a scale of minus 2 to 2Runs Small True To Size Runs BigWas this helpful? - JLJulia L.Verified BuyerReviewingWomen's Merino Bikini Sand / LI recommend this productRated 4 out of 5 stars7/31/25Needed new undies - these work
In need of new undies, I would try unbound merino’s bikinis. Having worn them twice now I like them very much in terms of overall comfort and fit. I’ve given four not five stars because they are a little tighter around my skinny legs than I prefer, and therefore, I suspect show under my slacks.
How did you find the fit?Rated -1.0 on a scale of minus 2 to 2Runs Small True To Size Runs BigWas this helpful? - LWLeslie W.Verified BuyerReviewingWomen's Merino Bikini Sand / MI recommend this productRated 4 out of 5 stars7/31/25Good quality
I like the material. It’s a good thickness. Good coverage in back. I’m a mom and would prefer a higher waist in front.
How did you find the fit?Rated 0.0 on a scale of minus 2 to 2Runs Small True To Size Runs BigWas this helpful?