Our goal is to help you move above the tree line—no matter the day of your cycle.
To make that happen, we focus on what we do best: building gear that performs when it matters. Together with Female Engineering, a femtech brand by Lindex, we created a period panty designed around real needs.
Combining Female Engineering's expertise in menstrual wear with our mountain performance heritage, the result is reliable period protection, comfort, and one less thing to think about when you’re out there.


Female Engineering is a Swedish femtech brand by Lindex with over 70 years of experience in underwear and knowledge about the female body that constantly strives to innovate women-focused products. Their mission: solve real needs to make everyday life better for women.
It’s all powered by Engineered Leak Tech™: a system of carefully designed layers that work together to keep you protected.





The period panties have gone through extensive testing and can be worn for up to twelve hours. In case you go for a high absorbency on a medium flow day for example, it can often be worn for even longer.
Panty absorbency guide:
-Medium: 20 ml (≈ 2 tampons/pads)
-High: 40 ml (≈ 4 tampons/pads)
For reference, the average total menstrual fluid loss per cycle is around 35 ml.
After you’ve worn them, rinse the panties in cold water until the water runs clear and then wash at max 40 °C.
Use a separate laundry bag to give your panties some extra care. And yes, you can wash your period panties with the rest of your clothes.
Period underwear love fresh air and prefer to be hung up to dry inside out.