Leak-proof underwear — how it works and what the research says
Dela
Leak-proof underwear has gone from a novelty to a given for many in just a few years — for menstruation, minor urine leaks, and after childbirth. But how do they actually work, and what does research say about when they are best suited? Here's an honest review.
How the underwear is constructed
Leak-proof underwear is based on a multi-layer construction: a top layer that quickly wicks fluid away from the skin, an absorbent middle layer that locks in the fluid, and an outer barrier layer that prevents it from seeping through to clothes. Textile research shows that it is precisely the combination of permeable and absorbent layers that determines how well the underwear works — and that the construction also helps keep the skin dry and clean. Read the study on the underwear's layer construction here.
What does research say — when are they best suited?
We want to be honest here, because everyone benefits from it. A notable study in BMJ Sexual & Reproductive Health (2023) tested menstrual products with real blood for the first time instead of saline solution. It showed that period underwear absorbs less than, for example, tampons and pads — which means they are most useful:
- On light period days — at the beginning and end of your period, when a pad feels excessive
- As a backup — together with a tampon or menstrual cup on heavy days, to avoid worry about leakage
- For discharge and minor urine leaks — in everyday life, during exercise, or when you sneeze and laugh
- After childbirth — when the body is still healing
If you have very heavy periods, our honest advice is to use the underwear as a complement, not as your sole protection. Read more about the study in Scientific American.
Urinary leakage is more common than you think
If you have ever leaked a little when you coughed, exercised, or laughed, you are far from alone. Research reviews show that about one in three women experience urinary leakage during the first months after childbirth, and in the adult female population at large, it affects up to one in three to one in four. Read the research review on PubMed. Yet, we rarely talk about it. Leak-proof underwear does not solve the cause — for problems, pelvic floor exercises and contact with healthcare are the right path — but they make everyday life significantly more secure in the meantime.
SilkyDry — looks like regular underwear
Our SilkyDry™ leak-proof underwear is designed to look and feel like regular underwear — no diaper feeling, nothing visible under clothes. They are available in several colors and sizes from XS upwards, and can be washed and reused again and again — good for both your wallet and the environment compared to disposable protection.
Frequently asked questions
How do I wash leak-proof underwear?
Rinse in cold water after use, then wash at 30–40 degrees without fabric softener (fabric softener clogs the absorbent layer). Air dry.
Do they feel like a diaper?
No — that's the whole point. The layers are thin and integrated into the underwear, so they look and fit like regular underwear.
Are they enough as sole protection during menstruation?
On light and moderate days, yes for most. For heavy periods, we recommend them as a secure backup to a tampon or menstrual cup.
How long do they last?
With proper care, leak-proof underwear typically lasts a couple of years of regular use.
Sources: BMJ Sexual & Reproductive Health 2023; Journal of Engineered Fibers and Fabrics/PMC 2024; systematic review PubMed. For problems with urinary leakage — contact healthcare. Individual experiences may vary.