10 Best Period Underwear [Tested and Reviewed]

The Proof Company's Leakproof High-Rise Brief Period Underwear features their innovative Leak-Loc® technology, which aims to offer a comfy fit.

This underwear can soak up to 15mL of liquid, roughly equivalent to what you might need for about six hours of heavy flow. While it might feel slightly damp after absorbing, it generally stays dry and avoids stickiness, which is definitely a bonus.

But, it's worth noting that after washing, the underwear showed signs of leaking when it hit about 4.5mL of absorption. This suggests that you might experience leaks more often after several washes. Because of this, it's a good idea to pair these briefs with pads or tampons for extra security.

The design includes a wide waistband and stretchy thigh bands, ensuring you won't feel squeezed in or uncomfortable, especially during your period. Plus, the seamless construction means you can wear tight outfits without worrying about underwear lines.

These are a solid choice for anyone looking to reduce menstrual leaks and stay comfortable and active during their period.

The Period Company's High Waisted Period Underwear in Microfiber for Medium Flows offers a comfortable feel with an organic cotton crotch lining.

Designed to hold up to 10mL of liquid, this underwear is suited for about four hours of menstrual flow. The absorbent area might get damp but doesn't become overly saturated, avoiding any sticky discomfort.

However, a potential downside is that after washing, the underwear began leaking at just 2mL of absorption. This indicates it may not be reliable for solo use over time and is better paired with pads or tampons for added protection.

The underwear features a thick waistband and stretchy thigh bands, ensuring a snug yet comfortable fit without digging into your skin. One point to note is that because the absorbent area extends toward the tailbone, it could feel a bit uncomfortable when worn.

With its extensive absorbent area, these shorts are particularly useful for nighttime. If you're someone who moves around a lot in your sleep and is concerned about leaks from pads or tampons, this underwear could be a game-changer for you.

Lyv Life's Cora The Free-To-Flow Period Underwear is designed with your health and the environment in mind, free from toxic chemicals, PFAS, and azo dyes. Even though the packaging has been updated, the quality and composition of the underwear haven't changed.

In our tests, the underwear initially absorbed up to 7mL of liquid. However, post-washing, it started to show leaks when holding just 5mL, indicating a decrease in absorbency with use. Despite this, it can still serve well as a backup option for lighter flow days.

The material where the liquid is absorbed doesn’t hold onto moisture much, which minimizes stickiness. There's a bit of a damp feel, but it's not uncomfortable.

The downside is the leg bands lack stretch, which might lead to discomfort as they can rub and dig into your thighs during movement. On the upside, the wide waistband ensures a comfortable fit without feeling tight, and the thin absorbent layer makes it feel almost like you’re wearing regular underwear.

Modibodi's Sensual Hi-Waist Bikini not only looks great with its lace detail but also uses their unique Modifier Technology for absorption.

In our tests, it managed to absorb up to 6mL of liquid. However, after washing, it began leaking at just 2mL. This suggests that over time, its effectiveness might decrease, making it more suited for lighter flow days.

One thing to note is that the crotch area can feel pretty wet once it absorbs liquid, giving that uncomfortable wet underwear sensation. This might be a deal-breaker for those with sensitive skin, as even a small amount of moisture can feel sticky.

On the brighter side, the wider waistband ensures the underwear doesn’t feel too tight, and the stretchy bands around the thighs help minimize chafing.

Despite its reduced absorption capacity and potential for stickiness, its comfort and style make it a viable option for everyday wear, especially on lighter days.

The Absorbent Panty by Bambody stands out for being as comfy as your everyday underwear, with the bonus of being PFA-free.

A big plus is its wide elastic waistband and the elasticity around the legs, which means you won’t feel squeezed in. Its absorbent area is slim, making it feel almost like you’re just wearing regular underwear – a really nice touch for those who love high-rise styles.

During our testing, it managed to absorb up to 3mL of liquid. However, post-wash, its absorbency dipped slightly to 2.5mL. There’s also a bit of a damp feeling left on the surface after absorption, which might lead to a sticky sensation.

Given it can only handle about an hour’s worth of menstrual flow and might feel a bit uncomfortable due to stickiness, it’s probably not the best option to wear solo on heavier days. It could serve well as a backup, though.

Hanesbrands' Hipster Period Underwear FD41MS comes in packs of three and is designed to offer generous coverage both in the front and back.

In our absorbency testing, these hipsters managed to hold only 4mL of liquid initially, but this capacity dropped to just 2mL after washing. This decrease suggests a significant risk of leakage, even with minimal menstrual flow.

While the underwear's surface remains smooth after absorbing liquid, applying pressure can cause dampness to resurface, potentially leading to a sticky feeling.

A notable concern is the thin elastic in the waistband, which some might find too tight around the abdomen. Testers expressed worries about the waistband digging in and possibly causing discomfort or irritation around the stomach area. However, the thigh elastics are more forgiving and offer some stretch, reducing the risk of chafing. This could make them a comfortable choice for those without concerns about tightness around the abdomen.

Thinx's Thinx for All Cotton Brief in Moderate, with its timeless design, promises comfort and ample coverage. For this review, we focused on the black color option, though it also comes in wildcat.

During our absorption tests, the brief showed it could handle up to 2mL of liquid. However, post-wash, it began leaking at just 1mL. Furthermore, the moisture lingered on the surface, leading to a sticky sensation. Given this, it's best to think twice about using these during menstruation, especially since the skin may be more sensitive during this time.

The silver lining is its comfortable fit, thanks to the elastic bands around the waist and thighs. Feedback from our tester was notably positive, highlighting that the brief "didn't feel constricted and fits well on the body," making it unlikely to cause discomfort during wear.

While the limited absorption might raise concerns for menstrual use, these briefs could still be an option for days with very light leakage. Just be sure to clean any moisture from the surface to maintain comfort.

LOLA's Washable Period Underwear is celebrated for its comfort and sleek design, crafted from breathable cotton for a non-bulky feel.

In our absorption tests, the underwear began leaking at just 2mL, and after a few washes, this threshold dropped to 1mL. Given these results, it might be best to look for other options during your period.

However, a positive aspect is that it manages to stay dry after absorbing fluids, which means you won't have to deal with any stickiness.

The underwear features a comfortably thick waistband, and the elasticity around the legs is designed to prevent cutting into the skin, making it more comfortable to wear. Yet, for those with fuller thighs, it's worth noting that the thick and somewhat rigid seams in the crotch area could potentially cause discomfort due to friction.

Knix Wear's Leakproof Bikini is part of a lineup that includes a variety of styles like High Rise, Boyshort, and Thong, offering something for everyone's preference.

During our evaluation, we noted that the absorbency was quite low, at 1.5mL, a level that remained consistent both in new conditions and after several washes. Furthermore, when pressure was applied to the wet area, it released a significant amount of water, making it prone to feeling damp—a notable downside for those considering it as a menstrual backup.

However, there are positives. The bikini features a comfortably wide waistband that isn’t overly tight, and the thigh elastic is designed to minimize chafing, enhancing overall comfort. The seamless design is another advantage, making these bikinis a great option under tighter clothes without worrying about visible lines.

Saalt's Leakproof French Cut High Waist offers a unique blend of style and functionality with its high-rise fit and French-cut leg openings, accentuated by a chic mesh design.

The underwear is designed with comfort in mind, featuring a wide waistband and elastic thigh bands to reduce any discomfort or tightness. However, some testers noted that the high-rise style, extending up to the belly button, felt a bit unusual, so this might be something to consider if you're particular about the rise of your underwear.

In our absorption tests, we observed that the underwear began leaking at just 1mL of absorption. While the surface didn't stay moist, it wasn't completely dry either, suggesting potential discomfort from stickiness over prolonged wear.

Consistent with its initial performance, even after several washes, the underwear allowed a small amount of moisture through, indicating it might not be the best choice for menstrual use due to its limited absorption capacity.