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Alex is 177 cm / 5'10" and wears XS

COTTON

Flex Thong

Flex Thong

$18 Regular price Sale price
Regular price $18
91% organic cotton
Color: Black
Color
Size
Only 0 left in stock
Produced using -11% less kgCOâ‚‚e than industry standard
Designed in Copenhagen Made for anywhere
Soft and smooth thong that hugs you in all the right ways for a second-skin feel.
  • Low to mid-rise thong with heat seal logo
  • Dipped front for an extra flattering fit

Cotton is a natural fiber that is commonly used for its breathability and softness. Using organic cotton instead of regular cotton has the potential to build soil health, as it is grown without the use of synthetic fertilizers. - Body: 91% Organic Cotton, 9% Elastane - Gusset: 95% Organic Cotton, 5% Elastane - Machine washable with similar colors. Maximum 40°C wash - We recommend the conscious choice of 30°C - Snug, body-hugging fit in a soft and stretchy material. If between sizes, we recommend sizing up

0 % less kg CO2e
OUR Product Footprint1.33kg CO2e
Industry Standard1.20kg CO2e
kg CO2e
0.23
0.48
0.32
0.22
0.08
0.01
0.73
Traceability
Indonesia
China
India
India
China
Sea
Spain
Total ImpactSavings
0.01 mol H+-Eq
-1%
3.70 MJ
53%
0.02 mol N-Eq
8%
7.48 CTUe
72%
1.33 kg CO2e
-11%
49.81 pts
-205%
0.54 m3
77%
This data comes from a Life Cycle Assessment conducted by Made2Flow, specifically for the product featured on this page. These calculations apply to the most recent delivery of this product to our warehouse in 2025 and will be refreshed annually if the product is restocked. Read more about the calculations here.
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Overall rating: 4.701351 / 5 from 740 reviews.

AI Generated Review Summary

The Flex Thong is praised for its flattering shape, high-quality fabric, and soft, comfortable feel. Customers appreciate the perfect cut and unmatched quality, though there are mixed opinions on sizing.

Summary topics

  • Shape: 6%
  • Fabric: 11%
  • Material: 13%
  • Cut: 5%
  • Quality: 14%

Review topics: [size, fit, color, lines, fabric, material, design, feels, quality, look, shape, shirt, comfort, style, stretch, piece, cut, texture, packaging, pants, coverage, comfy, value, thong, difference, detail, hips, underwear, cotton, undies].

Review highlights

  • "Love the fabric quality, the fit and the colour."Christèle M.
  • "Perfect fit and shape, comfy, lovely material."Nat
  • "I love the diverse colours, the fabric feels soft and the fitting is elegant and simple."Hannah B.

Reviews

Amazing Undies but colors/ sizing vary

"This was my first purchase from OB that I loved- I am happy I stuck it out and kept trying. I would definitely size up in this style, and recommend this over the traditional core thong. Comfy and stylish, great fit once I found a style/ color that worked (as colors vary in sizing as well. ) 10/10"

Kehana K. (5/5)

I love the fabric, it

"I love the fabric, it is very soft. I basically can't feel it when wearing it, also it is not visible much under clothing. If you expect them to stay skin-tight (in a comfy way) I recommend sizing down 2 sizes. I sized down 1 size, and they still get a bit loose over the day. I am usually an XL, ordered L this time."

Andrea R. (4/5)

This underwear is lovely. They

"This underwear is lovely. They are high quality and make me feel like I am doing a service to my intimate parts by wrapping them in organic materials instead of synthetic ones. I love them so much this is the second pair I have ordered from this website. Huuuuge fan and will for sure buy more!"

Beat K. (5/5)

The best thong

"Very comfortable, feels free light and easy! Can’t wait to have more of them and get rif of all my other old panties! I am planning to buy also on white for the summer. The texture is soft, and range is true to size. The thing that impressed me the most is the quality of the elastase"

Giulia S. (5/5)

New Go-to!

"My new favorite brand to purchase underwear from! The material is soft and comfortable. The shape is like that of some more expensive underwear brands I know, but for a far more economic price."

Mackenzie H. (5/5)

What a find! Completly unexpected,

"What a find! Completly unexpected, that thong can be stretchy but organic! The model of it is a perfection - it covers the parts that needed and at the same time nothing digs in to your sides. The texture is soft and comfortable. And the color! Summer vibes :)"

Alla V. (5/5)

Best pants ever!

"Breathable material. The elastase means they wash easily. The texture is lovely on the skin."

Nicola M. (5/5)

Decent - order size down

"Soft cotton and comfortable, but fit is quite large, I’d recommend ordering a size down. I’m between M & L and wish I would have gotten a M instead. By the end of the day they stretch out more and get fairly loose so they are not my preferred pair to wear."

Amanda D. (3/5)

Great, thin and soft material.

"Great, thin and soft material. Generous fit, probably true to size or slightly large. Somewhat small gusset."

Friederike P. (4/5)

The perfect pair of panties.

"The perfect pair of panties. Leaves no marks, comfortable and you can wear them beneath anything without it affecting your figure. Am on my way to replace all my underwear to these comfy ones, that also make me feel like a thousand bucks."

Torun B. (5/5)

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