Sayu (64).JPG


Již mám několik dnů po menstruaci a mé nadšení neopadlo. Opravdu jsem si kalhotky moc užila, jsou pohodlné, krásně sedí a neposouvají se, nemám pocit vlhka jako u konkurence a ještě ke všemu se cítím sexy :-)

Určitě v nejbližší době objednám další.

- Anna

Menstruating in Style

What are SAYU period panties?

​SAYU is a new brand of Czech period panties featuring unique technology. Say
good-bye to cumbersome, uncomfortable and wasteful sanitary pads and tampons!
SAYU panties are environmentally friendly, but above all they give you a feeling of 
freedom and elegance.


SAYU panties as gift? Contact us at to buy a gift voucher.

How does it work?

Knitted fabric from merino wool

Absorbent layer

Impermeable membrane

Outer material

These period panties have a functional pad sewn into them. Menstrual blood passes through the interior layer knitted from merino wool, which has antibacterial properties, is incredibly comfortable to wear on your skin, and guarantees you’ll feel dry and fresh.

The blood is then wicked away into an absorbent layer of bamboo, the absorption capacity of which is much higher than that of cotton. Bamboo, too, has antibacterial and thus odor-blocking properties. Beneath the absorbent layer is a special inlay:

an impermeable yet breathable membrane that protects your clothes.

Our panties are also a great choice if you suffer from light incontinence.

Do I have to use a tampon or pad?


The functional inlay has excellent absorbent properties; in conjunction with the impermeable membrane, the panties will do their job reliably for 8-12 hours at a time.

If you have a really strong period, you may extend your active day, being out and about, by combining the panties with a tampon or menstrual cup.  

Schematic Drawing of Membrane’s Positioning

The first Czech period panties to be made of merino wool

Merino wool prides itself on combining numerous desirable properties:

-   Silky to the touch

-   Antibacterial properties

-   Prevents odors

-   Naturally elastic

-   Thermoregulating capabilities

-   Wicks away moisture

-   Breathable even after becoming wet

Where do they come from?

SAYU panties are assembled and sewn by a venerable lingerie maker in the Czech Republic; most of the materials that go into them, including the merino wool, is produced in the Czech Republic. The SAYUtech membrane was developed specifically for our product by a leading nanotechnology expert and tested in a Czech university lab.

When innovation meets tradition

Ethical merino wool

Our wool is sourced from Australian sheep that are raised and kept "Mulesing free"

The yarn is being spun at a bluesign®-certified firm in Austria

The yarn is then being turned into woven fabric and dyed at a Czech company with Class II oekotex® certification

Instructions for Use

Wash before the first use – this step cannot be skipped, as it activates the absorptive power of your panties. We recommend a machine run at 40°C, with the spin cycle speed set at a maximum of 1,000 rpm. It’s crucial that you use liquid laundry detergent. Washing powder might damage the membrane. We recommend ecological liquid detergent designed for
delicate laundry. Always using a laundry net for delicates helps protect the merino wool. Don’t use fabric softener – the panties would no longer be absorbent, and the membrane might moreover become damaged.


After use, rinse the panties in cold water. If you want, you can add soap that is suitable for wool (i.e., soap on lanoline or olive oil basis, or Marseille soap). However, we strongly advise against using cosmetic soap, bile soap, or curd soap. Gently knead the panties under your fingers in the crotch area. Don’t rub them! Also, don’t wring them, just squeeze them
lightly until they no longer drip. If you follow these steps, the merino layer will remain soft and smooth for many months without pilling. Wash your panties using a 40°C washing program and let them dry inside-out (but not on a radiator or in direct contact with a heated

There is no rush; the used panties won’t smell or stain. Simply let them dry, inside-out, after rinsing them by hand. You can then wash them as part of your regular laundry at your convenience. Your panties are again ready to use!


SAYU s.r.o.

ID number: 08320497

VAT number: CZ08320497

+ 420 773 739 774

Červená Skála 338


250 68

Czech Republic

If you have any questions or feedback, please drop us a note - we want to hear from you!
Sign up for SAYU news!
By clicking on "SIGN UP" you accept our Data Protection and Privacy Notice


SAYU is a family business founded in 2019. The year prior, we busied ourselves developing the technology, designing the cuts, sourcing quality materials, and finding the right producers. We found that the Czech market lacked the kind of period panties that would meet our expectations in terms of quality, design, build and functionality. We keep working on new designs and improving our technology. Your suggestions and your feedback help us continuously improve.

Jana, Majda and Pavel