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ooia Thong black

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from 3 pieces: free shipping from 5 pieces: free shipping and -10%

product details

Your ooia Thong with its clean design and the extraordinary, striped look will be your elegant, timeless companion during your period. It feels extremely thin underneath your clothes. 

The ooia period underwear holds up to one tampon of liquid while feeling completely dry. This makes it ideal for your light menstrual period days. Plus, the ooia thong is washable, making it reusable. You can wear the ooia Thong alone or as a back-up to other period products.

ooias are produced ethically and ecologically fair in Portugal, Lithuania and Croatia with fabrics from Europe.

Our model Liz wears a size 36 and our model Laura wears a size 44-46.

With your purchase you support organizations that promote female empowerment with their projects - here to learn more.


An ooia period panty is as beautiful and comfortable as your favorite underwear, but it can do so much more: it has a built-in membrane system in the crotch that soaks up the liquid and keeps it from leaking out.

  1. The layer closest to the body is made out of soft merino wool. It quickly wicks moisture away from the body. So you feel dry at all times. In addition, it is equipped with a bacteria-inhibiting agent, so that no bacteria can multiply and no unpleasant odor develops. More info: click here
  2. The middle layer is made out of specialized fibers that absorb moisture very quickly. This layer is also equipped with a bacteria-inhibiting agent. More info: click here.
  3. The outermost layer is a liquid-impermeable membrane that doesn't let any liquid through to the outside, protecting you from leakage. In addition, this layer - just like all the other layers - is breathable and thus ensures that you do not sweat.


After wearing your ooia, it is best to wash it by hand in cold water.

Then you can put it into a laundry net and into the washing machine and wash it at 40 degrees ideally in the easy-care wash cycle - you can also do this along with other dark laundry.

Please don't wash your ooia with full strength detergent, as this is too aggressive for the wool. Instead, ideally use wool detergent.

Please do not use bleach or fabric softener, as this will reduce the effectiveness of ooia.

Please also do not dry clean - but who takes their underpants to the dry cleaners?

Ironing is also a no-go, just hang your ooia on the clothesline and it will soon be ready to wear again.

If you treat ooia well, it will retain its full bacteria-inhibiting effectiveness for about 2 years. After that, of course, you can still continue to use them as "normal" underpants.

If you want to know more about how to was your ooia, click here.

bacterial inhibition

Because your health is our top priority, we've sought the opinion of gynecologists on the requirements for bacterial growth inhibition.

These gynecologists confirm to us that it's fundamentally important that period underwear inhibits bacteria from growing - and that high-quality, tested fabrics are used to do so.

Our membrane system has bacteria-inhibiting properties at key points -so that bacteria can neither multiply nor develop unpleasant odors. Our active ingredient silver chloride is tested under the strictest conditions and may be used in Germany in accordance with Article 89 of the Biocide Ordinance in conjunction with Section 28 (8) of the Chemicals Act. Of course, we do not use any nanoparticles that are controversial to health.

The bacteriostatic effect of the silver chloride takes place directly in the fiber.

The Hohenstein Institute carried out elaborate testing on our ooias to ensure its antibacterial activity.

The Hohenstein Institute is a very renowned German textile testing and research institute that awards various certificates.

ooia is the only period underwear in the world whose function is certified - we are proud of that!


ooia is made out of carefully selected, specialized fabrics made in Europe. The ooia hipster is certified and tested for harmful substances according to STANDARD 100 by OEKO-TEX® [21.0.46579 HOHENSTEIN HTTI]. Thus, the ooia hipster is certified skin-friendly and harmless to health.

In addition, our wool comes from merino sheep that are treated fairly (mulesing free).

Some raw materials which enter our fabrics cannot be sourced from Europe, as this is not possible for climatic reasons.

material composition:

Upper fabric: 93% cotton, 7% spandex

Lining: 100% wool (merino wool: mulesing - free)

Mid-layer: 80% cotton, 20% polyester

Membrane: 100% polyester backing, 100% polyurethane membrane

bacteria inhibition

Your health is our top priority

Gynecologists confirmed us that a bacteria-inhibiting coating on period underwear is essential.

This prevents odors and the multiplication of pathogens.

At ooia, we are the only period underwear brand in the world to have this effect certified - by the renowned Hohenstein Institute! Our active ingredient silver chloride is tested under the strictest conditions and may be used in Germany in accordance with Article 89 of the Biocide Ordinance in conjunction with Section 28 (8) of the Chemicals Act. Silver has been used for centuries to protect against diseases. Already in ancient Greece and Rome it was used to disinfect water.

The bacteriostatic effect of the silver chloride takes place directly in the fiber.

We attach particular importance to communicating transparently here.

EU Regulation No 528/2012: biocidal active ingredients is silver chloride

No nano particles are used

If you want to know more, click here.

delivery and returns


Your ooias will be delivered to you within Germany with DHL GoGreen if your purchase is over 30€, below that with the Deutsche Post GoGreen. To Austria, Luxembourg, France and Switzerland, we always ship with the Deutsche Post GoGreen.

For an order of 1-2 products, shipping costs 5 € in Germany and Austria and 10 € in Switzerland, France and Luxembourg. Shipping is free when you buy 3+ ooias (from 26,95€) in Germany, Austria, Switzerland, France and Luxembourg. However, the ooia accessories are excluded from the scale discount.

All deliveries are trackable via a tracking number, which you will receive in your shipping confirmation.

Shipping to other countries is not possible at the moment - but we are working on it!


It is very important to us that you are completely satisfied with your ooia. Therefore, returns are possible: You only have to return ooia within 90 days (unworn, of course) and pay the postage for the return shipment.

To do this, please log into our returns portal here and follow the instructions to print out your returns label.

Once the item has been inspected at the warehouse, your money will be credited to you (within 3-7 business days of being received by our logistics provider).

Please note that ooia cannot be returned if it has already been worn.

An exchange is also not a problem. Here, you pay the cost of the return shipment (just like the return) and we bear the shipping cost of resending your ooia.

Please log in to our returns portal here and follow the instructions to print your returns label.

In the portal, you also specify which ooia you want as an exchange.

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