How period underwear works

Our period-proof panties are a trustworthy companion in your everyday life. They absorb menstruation blood, prevent leaks, control smell and wick moisture. So you can stay comfy and dry through both lighter and heavier days.

Our period-proof panties have integrated menstrual protection and can be worn for up to 10 hours. Then you rinse them, wash them and wear them again and again. Thanks to the Engineered Leak Tech™, the panties can absorb blood while keeping you dry, comfy and odour-free.

Our period-proof underwear are engineered to replace disposable products and menstrual cups completely. They come in a great variation of styles, colors and absorbency levels, making it easy for you to find your perfect match. Our highest absorbency level (Super) can hold up to 50 ml of blood which equals about 5 tampons’ worth. Additional protection is never needed – you can trust the panties to do the job.

How much blood can the period underwear hold?

Our period-proof underwear come in different absorbency levels, much like disposable menstrual products: 

5 ml Mini ≈ ½ tampon/panty liner

10 ml Light ≈ 1 tampon/pad 

20 ml Medium ≈ 2 tampons/pads 

30 ml Mid-high ≈ 3 tampons/pads 

40 ml High ≈ 4 tampons/ pads 

50 ml Super ≈ 5 tampons/ pads 

Engineered period-proof panties

Engineered Leak Tech™

Our underwear is a science-based innovation designed to keep you dry and comfy during your menstruation. The secret is the Engineered Leak Tech™ - a patented technology consisting of three active layers, each featuring a specific function. The result? A life-changing, cutting-edge underwear made to simplify life for each and every person with a female body. 1. Wicking layer Draws away body fluids and dries quickly. 2. Absorbent & anti-odour Absorbs, capsules liquids, and blocks odour-causing bacteria. 3. Leak-resistant barrier Leak-resistant, carefully developed to leave you and your clothes stain-free.

Engineered Leak Tech™Absorbency AreaWicking layer100% polyesterLeak-resistant barrier100% polyurethaneAbsorbent & anti-odour87% polyester, 13% polyamide
  • Sometimes one plus one equals three, and sometimes it doesn’t. As long as the absorbency underwear level is matched with your flow level, additional menstrual protection isn’t necessary. Our period-proof panties are engineered to keep you dry and safe all day.

    However, some like to combine their period panties with other menstrual protection over the course of the entire menstruation cycle. This is of course a deeply individual thing, and we encourage you to explore and find your own optimal solution.

  • Our period-proof underwear is tested extensively and lasts for up to ten hours of wear.

    All of our models have the capacity to hold a large amount of menstrual blood. The High period-proof panty can hold up to 40 ml of blood - which is quite a lot, since the total menstrual fluid loss per period is on average 35 ml.

    But each body is unique, so the most important thing is that you choose the absorbency level that matches your personal flow level.

  • Our period-proof underwear is washable and can be used again. And again. We recommend starting with 3-5 pairs: that way, you’re covered for an entire menstruation cycle without having to do too much laundry. But every person is unique, with individual flow levels and laundry facilities. So, you can always start with 1-2 pairs to complement your usual protection. That‘s a good way to ease into using a new product - and to find out what works best for you.

  • Our period panties don't work the same way as disposable tampons or pads do, so you don't normally change them during the day. Our most absorbent period panty can hold up to 50 ml, which is a very large amount of blood - most women bleed 35 ml on average during their period.

    Just choose the absorbency level that meets your individual needs (or a higher one if you want to feel extra safe). Then wear the panties for the whole day - or night.

    Over time, you’ll get to know how your period panties deal with your own unique flow, and how you can adapt the absorbency level for different days of your cycle. Here are some signs to look out for, so that you know what level you need:

    • The weight of the gusset: the heavier it is, the fuller it is

    • The amount of blood traces you see on the wicking layer (the layer closest to the skin)

    • The stiffness: if the gusset is full, it might feel a bit stiff, as well as thicker than when freshly-washed

  • Yes, very much so. Regular period-proof underwear will most likely do the job perfectly well during the night. But, depending on your flow level and sleeping position (some of us just can’t keep still, right?) you might need a little extra protection when sleeping. And that's why we created night panties, that come in two different silhouettes:

    - Engineered Boxer Super Period Proof

    - Engineered High Waist Super Period Proof

    The unique thing about our night underwear is the length of the gusset – it guarantees safety when you sleep. It doesn’t matter if you sleep on your back or snooze on your stomach (or maybe both?). The blood will stay exactly where it should, all night. Sweet dreams!