Period panties

Female Engineering® period panties have built-in protection that absorbs menstruation keeping you dry, comfy and odour-free all day long.
You can wear your period panties for up to 10 hours, and no additional protection is needed. When the day is over, you rinse them, wash them, and wear them again and again.
The panties come in different absorbency levels, making it easy for you to match your flow.
45-day free trial when you buy our period underwear for the first time.
How do they work?
Period panties are much like regular underwear but with added functionality that absorbs menstruation blood, prevents leaks, controls odour, and wicks moisture.
The secret is the Engineered Leak Tech™ - a patented technology consisting of three different layers working together to keep you dry, comfy and odour-free. Wear your period panties for up to 10 hours. Wash, dry, wear them again and again.
Washing your period panties
Washing the period panties is easy. The only step that differs from washing ordinary underwear is the pre-rinsing. Follow these three simple steps.
“This is revolutionary! I can wear my period panties a whole day without having to think about changing."
-Paula B
Your most common questions

Is the period panty leak-proof even if you bleed heavily?

Female Engineering® make period-proof underwear for all flow levels, from light to heavy bleeders. For those worried about bleeding more, we recommend starting out by wearing the period panty at home during a heavy bleeding day. That will put it to the test and make it easier to figure out how it works.​

How many times can they be used and washed? How long will they last?​

Our period panties are made to last at least 50 washes, which is far above industry standards. The number of washes is determined by the gusset absorption layer in our Engineered Leak Tech™, which has an antibacterial and anti-odour treatment that tends to lose a little bit of effectiveness after 50 washes. It is likely that the function of the panty will last longer though, but 50 washes is what we can guarantee. However, the fabric, form and fit of the panty will last a lot longer. If a panty is worn and washed once per menstruation cycle, it will last around 4 years.​

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 

From heavy period to lighter days:

Based on light panty liner, normal size tampon and normal sized pad. This means that the Mid-high period panty for example has the capacity to hold up to 30 ml of blood, which is almost equal to the total amount of the average menstrual fluid loss per one whole period - which is 35 ml (but varying between 20 and 80 ml).