Women's Merino Underwear Pack Builder

Regular price £57
Regular price Sale price £57
3.3
Rated 3.3 out of 5 stars
10 Reviews
Save £5
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Women's Merino Underwear Pack Builder

Regular price £57
Regular price Sale price £57
3.3
Rated 3.3 out of 5 stars
10 Reviews
Save £5

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.

Learn More
Underwear 1
Select a style:
Color Black
Size
Underwear 2
Select a style:
Color Black
Size
Underwear 3
Total £58. You are saving £4.

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.

Learn More
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What's included

Bikini Thong

Women's Merino Bikini

  • 60% Merino Wool, 34% Nylon, 6% Spandex
  • 290 gsm
  • Seamless Knit Fabric for all day comfort.
  • Lightweight
  • Fast drying
Sand

Women's Merino Thong

  • 60% Merino Wool, 34% Nylon, 6% Spandex
  • 290 gsm
  • Seamless Knit Fabric for all day comfort.
  • Lightweight
  • Fast drying
Black

MORE BUNDLE OPTIONS

Men's 3 Pack // T-Shirts Men's 3 Pack // T-Shirts Men's 3 Pack // T-Shirts Men's 3 Pack // T-Shirts Men's 3 Pack // T-Shirts Men's 3 Pack // T-Shirts Men's 3 Pack // T-Shirts

3 Pack // T‑Shirts

Regular price £196
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Bundle and save. Choose 3 T-shirts in a variety of colors and styles.

Regular price £196
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4.8
Rated 4.8 out of 5 stars
6,060 Reviews
Men's 5 Pack // T-Shirts Men's 5 Pack // T-Shirts Men's 5 Pack // T-Shirts Men's 5 Pack // T-Shirts Men's 5 Pack // T-Shirts

5 Pack // T‑Shirts

Regular price £322
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Bundle and save. Choose 5 T-shirts in a variety of colors and styles.

Regular price £322
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4.8
Rated 4.8 out of 5 stars
6,060 Reviews
Men's Hoodie + T-Shirt Bundle Men's Hoodie + T-Shirt Bundle Men's Hoodie + T-Shirt Bundle Men's Hoodie + T-Shirt Bundle Men's Hoodie + T-Shirt Bundle Men's Hoodie + T-Shirt Bundle Men's Hoodie + T-Shirt Bundle Men's Hoodie + T-Shirt Bundle Men's Hoodie + T-Shirt Bundle Men's Hoodie + T-Shirt Bundle

Hoodie + T‑Shirt Bundle

Regular price £186
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Choose 1 Hoodie and 1 T-shirt. Available in a variety of colors.

Regular price £186
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4.8
Rated 4.8 out of 5 stars
7,840 Reviews
Men's Travel Trousers + T-Shirt Bundle Men's Travel Trousers + T-Shirt Bundle Men's Travel Trousers + T-Shirt Bundle Men's Travel Trousers + T-Shirt Bundle Men's Travel Trousers + T-Shirt Bundle Men's Travel Trousers + T-Shirt Bundle Men's Travel Trousers + T-Shirt Bundle Men's Travel Trousers + T-Shirt Bundle Men's Travel Trousers + T-Shirt Bundle Men's Travel Trousers + T-Shirt Bundle

Travel Trousers + T‑Shirt Bundle

Regular price £226
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Choose 1 Travel Trousers and 1 T-shirt. Available in a variety of colors.

Regular price £226
Regular price Sale price £226
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4.8
Rated 4.8 out of 5 stars
6,862 Reviews
Men's 2 Pack // Travel Shorts Men's 2 Pack // Travel Shorts Men's 2 Pack // Travel Shorts Men's 2 Pack // Travel Shorts Men's 2 Pack // Travel Shorts Men's 2 Pack // Travel Shorts

2 Pack // Travel Shorts

Regular price £223
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Choose any 2 pairs of Shorts from 4 color options.

Regular price £223
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4.7
Rated 4.7 out of 5 stars
214 Reviews
Men's 2 Pack // Merino Travel Trousers Men's 2 Pack // Merino Travel Trousers Men's 2 Pack // Merino Travel Trousers Men's 2 Pack // Merino Travel Trousers Men's 2 Pack // Merino Travel Trousers Men's 2 Pack // Merino Travel Trousers Men's 2 Pack // Merino Travel Trousers Men's 2 Pack // Merino Travel Trousers Men's 2 Pack // Merino Travel Trousers Men's 2 Pack // Merino Travel Trousers

2 Pack // Merino Travel Trousers

Regular price £326
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Choose any 2 pairs of Travel Trousers. Available in a variety of colors.

Regular price £326
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4.6
Rated 4.6 out of 5 stars
1,181 Reviews
Men's 2 Pack // Compact Travel Hoodie Men's 2 Pack // Compact Travel Hoodie Men's 2 Pack // Compact Travel Hoodie Men's 2 Pack // Compact Travel Hoodie Men's 2 Pack // Compact Travel Hoodie Men's 2 Pack // Compact Travel Hoodie

2 Pack // Compact Travel Hoodie

Regular price £256
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Choose any 2 Travel Hoodies from 8 color options.

Regular price £256
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4.8
Rated 4.8 out of 5 stars
2,155 Reviews
Men's 1 Pack Bundle Men's 1 Pack Bundle Men's 1 Pack Bundle Men's 1 Pack Bundle Men's 1 Pack Bundle Men's 1 Pack Bundle

1 Pack Bundle

Regular price £103
Regular price Sale price £103
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Choose 1 T-shirt, 1 pair of underwear and 1 pair of socks. Available in a variety of colors.

Regular price £103
Regular price Sale price £103
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4.8
Rated 4.8 out of 5 stars
28 Reviews
Men's 2 Pack Bundle Men's 2 Pack Bundle Men's 2 Pack Bundle Men's 2 Pack Bundle Men's 2 Pack Bundle Men's 2 Pack Bundle

2 Pack Bundle

Regular price £205
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Save £41

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

Regular price £205
Regular price Sale price £205
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4.8
Rated 4.8 out of 5 stars
36 Reviews
Men's 3 Pack Bundle Men's 3 Pack Bundle Men's 3 Pack Bundle Men's 3 Pack Bundle Men's 3 Pack Bundle Men's 3 Pack Bundle Men's 3 Pack Bundle Men's 3 Pack Bundle

3 Pack Bundle

Regular price £292
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Save £77

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

Regular price £292
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4.8
Rated 4.8 out of 5 stars
24 Reviews
Men's 2 Pack // Button-Up Men's 2 Pack // Button-Up Men's 2 Pack // Button-Up Men's 2 Pack // Button-Up Men's 2 Pack // Button-Up Men's 2 Pack // Button-Up Men's 2 Pack // Button-Up Men's 2 Pack // Button-Up

2 Pack // Button‑Up

Regular price £241
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Choose any 2 Button-Ups from 6 color options.

Regular price £241
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4.7
Rated 4.7 out of 5 stars
179 Reviews
Men's 2 Pack //  Long Sleeves Men's 2 Pack //  Long Sleeves Men's 2 Pack //  Long Sleeves Men's 2 Pack //  Long Sleeves Men's 2 Pack //  Long Sleeves Men's 2 Pack //  Long Sleeves Men's 2 Pack //  Long Sleeves

2 Pack // Long Sleeves

Regular price £162
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Choose any 2 Long Sleeves from 8 color options.

Regular price £162
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4.9
Rated 4.9 out of 5 stars
1,980 Reviews
Unbound Merino - 2 Pack Merino Polo Unbound Merino - 2 Pack Merino Polo Unbound Merino - 2 Pack Merino Polo Unbound Merino - 2 Pack Merino Polo Unbound Merino - 2 Pack Merino Polo Unbound Merino - 2 Pack Merino Polo

2 Pack // Polos

Regular price £173
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Choose any 2 Polos from 8 color options.

Regular price £173
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4.8
Rated 4.8 out of 5 stars
980 Reviews
Men's 2 Pack // Boxer Briefs Men's 2 Pack // Boxer Briefs Men's 2 Pack // Boxer Briefs Men's 2 Pack // Boxer Briefs Men's 2 Pack // Boxer Briefs Men's 2 Pack // Boxer Briefs

2 Pack // Boxer Briefs

Regular price £65
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Choose any 2 pairs of underwear from 10 color options.

Regular price £65
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4.7
Rated 4.7 out of 5 stars
1,191 Reviews
Men's 2 Pack // Ankle Socks Men's 2 Pack // Ankle Socks Men's 2 Pack // Ankle Socks Men's 2 Pack // Ankle Socks

2 Pack // Ankle Socks

Regular price £26
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Choose any 2 pairs of Socks from 2 color options.

Regular price £26
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4.8
Rated 4.8 out of 5 stars
923 Reviews
Men's 3 Pack // Merino All Season Ankle Socks Men's 3 Pack // Merino All Season Ankle Socks Men's 3 Pack // Merino All Season Ankle Socks Men's 3 Pack // Merino All Season Ankle Socks

3 Pack // Merino All Season Ankle Socks

Regular price £37
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Choose any 3 pairs of Socks from 2 color options.

Regular price £37
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4.8
Rated 4.8 out of 5 stars
923 Reviews
Men's 5 Pack // Merino All Season Ankle Socks Men's 5 Pack // Merino All Season Ankle Socks Men's 5 Pack // Merino All Season Ankle Socks Men's 5 Pack // Merino All Season Ankle Socks

5 Pack // Merino All Season Ankle Socks

Regular price £57
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Choose any 5 pairs of Socks from 2 color options.

Regular price £57
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4.8
Rated 4.8 out of 5 stars
923 Reviews
Men's 10 Pack // Merino All Season Ankle Socks Men's 10 Pack // Merino All Season Ankle Socks Men's 10 Pack // Merino All Season Ankle Socks Men's 10 Pack // Merino All Season Ankle Socks

10 Pack // Merino All Season Ankle Socks

Regular price £110
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Choose any 10 pairs of Socks from 2 color options.

Regular price £110
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4.8
Rated 4.8 out of 5 stars
923 Reviews
Men's 2 Pack // Crew Socks Men's 2 Pack // Crew Socks Men's 2 Pack // Crew Socks Men's 2 Pack // Crew Socks Men's 2 Pack // Crew Socks

2 Pack // Crew Socks

Regular price £26
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Choose any 2 pairs of Socks from 2 color options.

Regular price £26
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4.8
Rated 4.8 out of 5 stars
911 Reviews
Men's 3 Pack // Merino All Season Crew Socks Men's 3 Pack // Merino All Season Crew Socks Men's 3 Pack // Merino All Season Crew Socks Men's 3 Pack // Merino All Season Crew Socks Men's 3 Pack // Merino All Season Crew Socks

3 Pack // Merino All Season Crew Socks

Regular price £37
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Choose any 3 pairs of Socks from 2 color options.

Regular price £37
Regular price Sale price £37
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4.8
Rated 4.8 out of 5 stars
911 Reviews
Men's 5 Pack // Merino All Season Crew Socks Men's 5 Pack // Merino All Season Crew Socks Men's 5 Pack // Merino All Season Crew Socks Men's 5 Pack // Merino All Season Crew Socks Men's 5 Pack // Merino All Season Crew Socks

5 Pack // Merino All Season Crew Socks

Regular price £57
Regular price Sale price £57
Save £-57
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Save £23

Choose any 5 pairs of Socks from 2 color options.

Regular price £57
Regular price Sale price £57
Save £-57
Sold Out
Save £23
4.8
Rated 4.8 out of 5 stars
911 Reviews
Men's 10 Pack // Merino All Season Crew Socks Men's 10 Pack // Merino All Season Crew Socks Men's 10 Pack // Merino All Season Crew Socks Men's 10 Pack // Merino All Season Crew Socks Men's 10 Pack // Merino All Season Crew Socks

10 Pack // Merino All Season Crew Socks

Regular price £110
Regular price Sale price £110
Save £-110
Sold Out
Save £50

Choose any 10 pairs of Socks from 2 color options.

Regular price £110
Regular price Sale price £110
Save £-110
Sold Out
Save £50
4.8
Rated 4.8 out of 5 stars
911 Reviews

What People Are Saying

3.3
Rated 3.3 out of 5 stars
Based on 10 reviews
Slide 1 selected
Total 5 star reviews: 3 Total 4 star reviews: 1 Total 3 star reviews: 2 Total 2 star reviews: 4 Total 1 star reviews: 0
How did you find the fit?Rated -1.1 on a scale of minus 2 to 2
10 reviews
  • JG
    Jessica G.
    Verified Buyer
    Reviewing
    Women's Merino Bikini Black / XL
    I recommend this product
    Rated 5 out of 5 stars
    7/6/25
    perfect

    Super comfortable and dried quickly after a hand wash. Will be perfect for travel.

    How did you find the fit?Rated 0.0 on a scale of minus 2 to 2
  • LS
    Lisa S.
    Verified Buyer
    Reviewing
    Women's Merino Bikini Black / S
    I recommend this product
    Rated 5 out of 5 stars
    6/27/25
    My New Favourite Underwear!

    I'm so pleased Unbound Merino finally makes women's underwear! I thought it would be the same material as the men's, but it is slightly thicker and more substantial, both of which are great features. The sizing is true to size and the underwear stays put throughout the day. So pleased to finally have a wool option for under garments. Thank you! I highly recommend both the bikini and the bra. They are super comfortable, breathable and take up next to no space when packing (see photos).

    How did you find the fit?Rated 0.0 on a scale of minus 2 to 2
  • KG
    karen G.
    Verified Buyer
    Reviewing
    Women's Merino Bikini Sand / M
    I recommend this product
    Rated 4 out of 5 stars
    6/27/25
    Love merino wool!

    I just bought 2 pair to try out before a trip. Seems like they will fit the comfort and quick dry criteria. I would have given five stars, but I am a high rise leg brief girl so wearing bikini is very different for me.

    Unbound makes solid quality products. Tip, if you like something then buy it as they can’t stay in stock on products.

    How did you find the fit?Rated -1.0 on a scale of minus 2 to 2
  • P
    Patricia
    Verified Buyer
    Reviewing
    Women's Merino Thong
    Rated 3 out of 5 stars
    6/24/25
    Too small

    Like another person said, the sizing is off. It is difficult to know what size to order based on the sizing description. I am normally a size small on most clothing items, but I ordered a medium. They were still too tight. Too bad you can’t exchange due to being underwear. Maybe a a large would have worked better.

    How did you find the fit?Rated -2.0 on a scale of minus 2 to 2
  • HJ
    Heather J.
    Verified Buyer
    Reviewing
    Women's Merino Bikini Black / S
    I do not recommend this product
    Rated 2 out of 5 stars
    6/14/25
    Tight fit!

    This bikini is advertised as "seamless" but it is not. There is a seam and so much elastic mixed in with the merino that the underwear definitely cuts into your fleshy areas. The models must not have any fleshy areas, because these underwear look smooth on them. Sadly, I regret purchasing these underwear, but you can't return something that you've worn, so I am stuck with them. The underwear also fit very small. For reference, I'm 5'4" tall and 127lbs and I wear size Small underwear in every other brand. But Unbound Merino's Small bikini underwear are MINI on me, so tiny that you see the top part of my butt crack.

    I love Unbound Merino, but sadly I do not love these underwear.

    How did you find the fit?Rated -2.0 on a scale of minus 2 to 2