Period swimwear is exactly what it sounds like: swimwear with a built-in leak-proof lining so you can swim on your period without a tampon or cup. It works on the same layered principle as period underwear, tuned for water. Yes, you can get in the pool or ocean. No, it does not fill up like a sponge. Here's how it actually holds up.

How does period swimwear work?

It has the same kind of layered, leak-proof gusset as period underwear, designed so that in water it holds light flow and stops leaks without absorbing the whole pool. The clever bit is that the lining holds menstrual blood but does not soak up the water around it, so you stay protected without a soggy cossie. More on how the layers work.

Can you actually swim on your period with it?

Yes. Between the natural counter-pressure of water, which slows your flow while you're submerged, and the leak-proof lining, period swimwear is built for exactly this. It is best for light to moderate flow on its own. On your heaviest day, you can pair it with a period cup for total peace of mind. More on using a cup.

Is period swimwear leak-proof?

It is designed to be for light to moderate flow. The lining holds what comes while you're in and out of the water. The moment to be mindful is when you climb out, because gravity and no more water pressure mean flow can pick up, so plan your exit like you would any other day on your period. For a heavy day, the cup-plus-swimwear combo is your friend.

Does period blood show in the water?

No. The lining holds your flow, so you are not leaving a trail, and the darker gusset is discreet from the outside. It looks like normal swimwear because it is normal swimwear, with a very clever lining.

How do you care for period swimwear?

Rinse it in cold water straight after swimming, the same as you would to get chlorine or salt out, until it runs clear, then machine wash cold and hang to dry. No dryer, no softener. Treat it well and it lasts season after season.

Shop Period Swimwear, including the Swim Bikini Brief and Swim Short.

Quick answers

Does period swimwear really work?
Yes. A layered leak-proof lining holds light to moderate flow in water without absorbing the pool. Pair it with a cup on your heaviest day.

Can you swim on your period without a tampon?
Yes. Water pressure slows your flow while you're submerged, and the leak-proof lining handles the rest. Just be mindful as you get out, when flow can pick up.

Is period swimwear leak-proof?
It's designed to be for light to moderate flow. Plan your exit from the water as you would any period day, and use a cup as well on heavy days.

Does period blood show in the water?
No. The lining holds your flow and the gusset is discreet, so it looks and behaves like normal swimwear.