The 9 Best Period Underwear – 2026 Rankings

I’ve tried a lot of period underwear over the years. Some feel like a diaper, others leak after an hour, and a few are surprisingly amazing. Finding the best menstrual underwear shouldn’t be a frustrating, trial-and-error process that ruins your favorite jeans.

So, I put dozens of pairs to the test. I wore them on light days, heavy nights, and during workouts. I also sent them to a lab to see how well they actually absorbed and how they held up after repeated washing.

These are the pairs that actually work. They’re comfortable, they don’t leak, and they make that time of the month a little less stressful. Here are my top picks for 2026.

 

 

Our Top Picks for Period Underwear

Knix Leakproof UltraThin No-Show Bikini

The Knix Leakproof Bikini costs $27. This pair feels more like athletic wear than period underwear, which I love. The material is so lightweight and breathable.

I found it was perfect for my light to moderate flow days, or as a backup with a tampon. The best part is the seamless design—you get zero panty lines, even under leggings. It also did really well in our lab tests, absorbing quickly and holding up after multiple washes.

The Downside: You have to follow the laundering instructions carefully. If you don’t, the material can start to fray over time.

 

 

Thinx Breathable Hiphugger

This pair from Thinx is priced at $19. It honestly just feels like a normal, comfortable pair of underwear with a secure fit. But it can hold about two tampons’ worth of flow.

I wore these for over 10 hours straight, which included a workout, and I didn’t have a single leak. They give you that all-day confidence you need for moderate to heavy days.

The Downside: In some of our lab tests, it absorbed a bit slower than a few of the other pairs on this list.

 

 

TomboyX First Line Period Boxer Briefs

The TomboyX Boxer Briefs are $38. For heavy flow and overnight protection, these are a dream. The full coverage design made me feel so secure, and I had no issues with overnight leaks.

The cotton-spandex blend is super soft and absorbs quickly. I was also really impressed by their size range, which is one of the most inclusive I’ve seen, going from 3XS to 6XL.

The Downside: Some people might find the fit a little bulky, especially under tighter clothing.

 

 

Saalt Leakproof Seamless Thong

Saalt’s Leakproof Thong is $30. I was skeptical about a period thong, but this one completely won me over. The material is silky and stretchy, and the absorbent liner is so discreet.

It’s a fantastic option for light flow days or as a backup when you want to wear something tight and avoid panty lines. It feels more like comfortable lingerie than period protection.

The Downside: It’s a thong, so the coverage is obviously very limited. It’s not meant for heavy flow days.

 

 

Bambody Absorbent Panty Period Underwear

This pair from Bambody costs around $20. For the price, this is one of the best menstrual underwear options out there. It’s an Amazon bestseller, and I can see why.

The fabric is smooth and the leakproof barrier runs from the front all the way to the back for extra protection. It manages to do this without feeling bulky, and the mesh sides are a nice touch.

The Downside: The sizing runs small. I’d definitely recommend going up one size from what you normally wear.

 

 

Modibodi Sensual Hi-Waist Bikini Heavy Overnight

The Modibodi Hi-Waist Bikini is $37. This is my top pick for heavy overnight flow. It absorbs an incredible amount—the equivalent of a super tampon—and the stylish lace waistband makes it feel less utilitarian.

It fit true to size and the bamboo-spandex fabric felt soft and stretchy. I felt completely comfortable and secure wearing this on my heaviest days.

The Downside: The padding in the crotch is quite thick. It’s not a huge deal, but you can definitely notice it.

 

 

Boody Period Leak Proof Hipster Bikini

Boody’s Hipster Bikini is $35. If you’re looking for an eco-conscious option, this is it. The organic bamboo fabric is exceptionally comfortable and it absorbed liquid faster than almost any other pair I tested.

It’s just a great all-around pair that balances function, comfort, and sustainability. The seamfree design is also really nice for all-day wear.

The Downside: On a really heavy flow, I did notice a slight feeling of wetness on the surface layer.

 

 

The Period Company Full Coverage Brief

The Full Coverage Brief from The Period Company is just $16. This is such an accessible price for a pair that performs this well. The fit is soft and secure, and it absorbs most liquid very quickly.

It’s my top budget recommendation for most people. The full coverage design gives you peace of mind without a high price tag.

The Downside: For your absolute heaviest flow, you may want to use this with a backup just to be safe.

 

 

Period Aisle Boxer

The Period Aisle Boxer is $36. I reached for these on my heavy first days. The organic cotton is so gentle and soft, and the absorption is excellent with very little transfer.

The boxer style provides full coverage and a secure fit, and I appreciate that they offer an extensive size range for both petite and plus-size bodies.

The Downside: Like a few others, it’s possible to feel some surface wetness when your flow is at its peak.

Switching to period underwear can feel like a big step, but finding the right pair makes all the difference. You get to ditch the discomfort of pads and tampons, and it’s a much better choice for the environment in the long run.

Whether you need something light and seamless for the gym or a heavy-duty pair for overnight, there’s a good option out there. The technology has gotten so much better, and they really do feel just like regular underwear now.