Introducing our latest innovation developed in collaboration with the Technical University — absorbent swimwear with merino wool.
This smooth model, crafted in the most popular classic mid-waist cut, features a functional pad with light absorbency, ideal for spotting, very light bleeding, or incontinence. It can also be used as a backup to a menstrual cup or tampon. Thanks to its waterproof yet highly breathable membrane, menstrual flow stays securely locked inside the pad. The pad’s touch layer is lined with merino wool, which is naturally antibacterial and breathable, helping to prevent vaginal infections while providing maximum comfort. The pad remains dry to the touch even when fully saturated which is a feature you’ll especially appreciate after stepping out of the water.
The high-quality swim fabric, made in Italy, is smooth and stretchy. It offers quick-drying properties and sun protection.
On the outside, our functional swimwear looks just like regular swimsuits, keeping its secret safely inside. Their elegant design will boost your confidence whether you’re at the pool, the sea, or a spa. Enjoy freedom of movement and carefree moments in the water with our menstrual swimwear.
The bands will shrink slightly after washing, so take this into account when trying on new, unwashed panties. When choosing the size we recommend to follow the measurements in our size chart, in case of any doubts please contact us via the contact form.
The swimsuit features a classic, mid-waist cut. The more deeply cut leg openings, finished with ultra-flat elastic bands, provide comfort even for wider thighs. The inner swim fabric is fully lined with the softest merino wool knit. The functional pad is very thin and remains completely discreet, invisible from the outside of the swimsuit.
The cut is versatile. You can wear it sitting low on the hips, which is ideal for women who prefer a lower rise. Alternatively, worn in the classic position, it suits those who prefer a mid-rise fit.
Inner layers:
1) 100% merino wool – mulesing free
Country of production: Czech Republic
Certificate: OEKO-TEX STANDARD 100 class II
2) 100% polyurethane
Country of production: Czech Republic
Outer layers:
1) 59% polyamide, 41% elastane
Country of production: Italy
Certificate: OEKO-TEX STANDARD 100
2) 100% zinc casting
Country of production: Germany
Certificate: OEKO-TEX STANDARD 100
Your skin won't get irritated from moisture. Our SAYUtech membrane with RET 1.6 is highly vapour permeable.
The touch layer is made of the finest Mulesing-free quality merino wool in 16.5 micron yarn. The swimsuit feels dry even after getting wet.
Ultra thin functional pad is indistinguishable from ordinary swimwear.
Outer quick-drying material with UV protection.
SAYU panties contain no PFAS, active silver or other added chemicals.
Machine wash before first use to activate the absorptive capacity.
✓ Soak in cold water after use
✓ Dark and light colors should be soaked and washed separately
✓ Rinse under running water; lanolin soap may be used to aid this step if desired
✓ Machine wash at 40 °C, max. 1000 rpm spin cycle
✓ Washing gel for wool, washing bag for delicate laundry
✓ Let dry loosely e.g. on a rack
× Don’t wring, twist or rub
× Don’t use cosmetic soap, bile soap, curd soap
× Don't use standard laundry detergent or fabric softeners
× Don't tumble-dry; let dry away from direct sunlight
