These Are the 9 Pairs of Period Underwear We’re Wearing With White Jeans
“Period underwear is made to feel like regular underwear while absorbing the menses without feeling wet,” explains Kimberlee Coleman, MD, a board-certified obstetrician-gynecologist at Pediatrix Medical Group in Margate, Florida.
To find the best period underwear, we tested pairs from brands like Saalt, Knix, and Le Mystère and considered other top-selling options on the market. We also spoke with two doctors about what to look for in period underwear. Here are the nine pairs that kept us worry-free, comfortable, and passed the leak test.
The Best Period Underwear We Tested
- Best for heavy flows: Saalt Leakproof Cotton Brief
- Best for medium flows: Le Mystère Smooth Shape Leak Resistant Brief
- Best for lighter flows: Le Mystère Smooth Shape Leak Resistant Hipster
- Best for spotting: The Period Company. The Thong Period. in SportyStretch For Light Flows
- Best disposables: Rael Organic Disposable Period Underwear
- Best for teens: Saalt Leakproof Teen Brief
- Best for inclusive sizing: Tomboyx First Line Period 9" Boxer Briefs
- Best seamless: Knix SuperPlus Leakproof No-Show Bikini
- Best for sleep: Saalt Leakproof Comfort CloudShort

Best for Heavy Flows
Saalt Leakproof Cotton Brief
Pros
- Heavy absorbency
- Patented gusset technology
- Available in various absorbency levels
- Soft, breathable cotton
- Inclusive sizing
- Treated without PFAS
Cons
- Not as seamless as other pairs
- Waistband tends to roll rather than sit flat
Having a heavy flow can be a real pain (both figuratively and literally). Women are often faced with using multiple period products to keep leakage at bay, not to mention managing the stress and constant worry of a dreaded leakage accident. So, finding a heavy-absorbency period product is key. That’s where the Saalt Leakproof Cotton Brief comes in.
It features a patented gusset — an extra layer of fabric in the crotch area — designed to replace three to four tampons, so women with heavier flows will feel more at ease. Throughout testing, this pair handled my heaviest days and even nights. I tested the absorbency claim with water, and this pair easily absorbed 7 teaspoons of water without any leakage. The underwear is made from lightweight cotton treated without harmful perfluoroalkyl and polyfluoroalkyl substances (PFAS), or “forever chemicals,” and I liked how soft and breathable it felt.
While this pair is comfortable, the brief style hits high on my shorter torso frame. It’s also not seamless. After multiple wears, the waistband hem rolled rather than lying flat, so this pair may be better for lounge days rather than going out.
Saalt recommends rinsing before hand-washing or machine-washing on a cold, delicate cycle. Just make sure to avoid the dryer, as high heat can affect the fabric. The company also sells its own delicate laundry mesh bag.
Women will appreciate the variety in options. The cotton briefs are available in inclusive sizing from XXS to 4XL and come in four shades, including black, pink, and lavender. Plus, with three absorbency levels — super, heavy, and regular — Saalt’s Cotton Briefs can tackle any day of your cycle.

Best for Medium Flows
Le Mystère Smooth Shape Leak Resistant Brief
Pros
- Designed for medium flow days
- Three layers of protection
- Bonded edges to prevent side leakage
- Soft, silky, and seamless feel
- Customized consultation and fitting options
Cons
- Hand-wash and air-dry only
- Available in one absorbency level
- Sizing runs big
Le Mystère Smooth Shape Leak Resistant Brief is designed specifically for those medium flow days, and our editors are happily slipping them on. This pair features an extended soft gusset with an antibacterial, odor-control finishing layer, plus an absorbent layer to prevent leaks and absorb excess moisture. The underwear is lightweight and sleek with a matte, microfiber finish and a touch of spandex to naturally hug the body. The bonded flat edging creates a seamless look and feel.
Ziegler loved wearing this pair. “I felt totally comfortable and was not worried that I’d bleed through these; it’s supposed to offer leakproof protection for medium flow days, which I think it does.” She also loved the feel and texture. “They feel really good on without being overly snug,” she says, “and the fabric feels like typical seamless underwear.” However, she notes that this pair ran a little big and high. “I found they sit higher on my waist and stomach than I anticipated for a brief,” she says, so consider sizing down.
For care, hand-wash and air-dry only. Le Mystère Smooth Shape Leak Resistant Brief comes in one absorbency and runs from S to XL with three color options: black, natural, and currant.

Best for Lighter Flows
Le Mystère Smooth Shape Leak Resistant Hipster
Pros
- Excellent for lighter days
- Extended rear gusset for extra protection
- Buttery-soft feel
- Seamless and flattering
Cons
- Hand-wash and air-dry only
- Smaller front gusset coverage
- Available in one absorbency level
As someone experiencing perimenopause, my cycle can be erratic, which is why I loved donning Le Mystère Smooth Shape Leak Resistant Hipster for my lighter days. This hipster style touts the same gusset with an antibacterial and anti-odor finishing layer that sits against the skin with a light to medium absorbency. The extended rear gusset helps prevent leakage, especially at night, and they feel buttery-soft and seamless.
On a recent summer swimming excursion toward the end of my cycle, I wore these under my bathing suit bottoms for extra protection. Despite getting soaked, they protected me as needed, were virtually seamless under my bathing suit, and didn’t feel uncomfortable wet.
Like the brief style, this pair must be hand-washed and air-dried. The hipster style is available in sizes S to XL and comes in four colors: black, natural, currant, and caramel. With excellent construction and design, this is a perfect pair for light flow days, especially if you prefer a more seamless and discreet look. Ever since testing, I happily wear them daily, especially with leggings or high-waisted jeans.

Best for Spotting
The Period Company. The Thong Period. in SportyStretch for Light Flows
Pros
- Discreet thong with light coverage
- Organic cotton gusset
- Affordable
- Numerous colors
- Dryer-friendly (tumble dry low only)
Cons
- Customers note a shorter gusset
- Fabric may pill over time
When it comes to spotting, I often struggle with what to wear for protection; it’s why we’re recommending The Period Company’s thong. It features several soft, stretchy layers and an organic cotton gusset for light absorption — the equivalent of two tampons — plus leak-resistant coverage. It’s worth noting that some customers find the gusset on the shorter side, so we suggest wearing these on spotting days only.
This discreet thong pairs well with leggings and tighter-fitting clothing. It’s optimal for light coverage without the feel or texture of a panty liner. If a thong style isn’t for you, don’t fret; there are plenty of other styles and cuts to choose from.
A single pair is one of the most affordable on our list, and the two-pack option for a few dollars more is a great bargain. Sizes range from XS to 2X and come in numerous colors, including tried-and-true neutrals or bright hues, such as citrus, plum, or coral.
For maintenance, this pair is washing machine– and dryer-friendly with a few caveats: The Period Company recommends rinsing after wearing, air-drying, washing on a warm cycle without bleach, and tumble drying on low. Just skip the iron to keep your pair in tip-top shape.

Best Disposables
Rael Organic Disposable Period Underwear
Pros
- Ideal for overnight coverage or postpartum care
- Offers 360-degree protection
- Heavy absorbency
- Organic cotton
- Chlorine- and fragrance-free
Cons
- Nonresusable
- Limited sizing options
I basically lived in disposable underwear after giving birth; it provided the protection and reliability my body craved as it healed. While we love reusable period products, sometimes you just need a disposable option, like Rael Organic Disposable Period Underwear, especially for overnight coverage or postpartum care.
The Rael period underwear comes in packs of 12 single-use, disposable pairs that can be worn for up to 12 hours. Each pair offers heavy protection, equivalent to the absorbency of four pads. The underwear has four absorbent layers and contoured cuffs for extra leak coverage. It’s easy to slip on, and the sides tear easily for a simple, mess-free removal.
It comes in two sizes: S to M (0 to 14 pants size) and L to XL (14-plus pants size). Rael offers a subscribe-and-save discount, so you can stock up whenever you need 360-degree protection.

Best for Teens
Saalt Leakproof Teen Brief
Pros
- Made for teens
- Treated without PFAS
- Soft, stretchy fabric
- Washing machine–friendly
- Numerous color options
Cons
- Sizing runs slightly small
- Pricey
Whether your teen is at school, sleeping, or participating in extracurricular activities, give them the gift of a worry-free period with the Saalt Leakproof Teen Brief. Designed specifically for young girls and teens, this pair has heavy absorption with a soft and sleek feel, so your teen will feel confident no matter what their flow is like.
“These were my daughter’s favorite out of the three she tried,” says Ziegler, whose daughter gravitated toward the soft, stretchy, and comfortable feel. Ziegler adds that the buttery-soft material and comfy fit may appeal to “kids who have sensory sensitivities.”
During testing, the thin gusset absorbed well without feeling or looking bulky, which is ideal for anyone in search of a discreet period product. “They also wash nicely,” she adds.
While they are pricey, Saalt offers discounts on the three- and five-pair packs, so consider stocking up. The Saalt Leakproof Teen Brief is available in youth sizes ranging from S (9 to 10) to XL (15 to 16), but Ziegler found the sizing to run on the small side.
Like the other Saalt products on our list, this pair can be cleaned in the washing machine in cold water and air-dried. When it comes to color options, Ziegler’s daughter appreciated the numerous choices, which include 10 playful hues and patterns, like Aqua Painted Confetti, Blue Surf, Pink Pearl, and Midnight Sky. “Any teen or young girl could benefit from this pair,” says Ziegler, who plans on keeping these for her daughter’s period kit.

Best for Inclusive Sizing
Tomboyx First Line Period 9" Boxer Briefs
Pros
- Sizes range from 3XS–6X
- Unique boxer brief style
- Floating gusset for added protection
- PFA-free and OEKO-TEX certified
- Available in seven hues
- Washing machine– and dryer-friendly
Cons
- Some customers find this style bulky
- Floating gusset may feel uncomfortable at first
The Tomboyx First Line Period 9-inch Boxer Briefs meet the mark for inclusive sizing — 3XS up to 6X — and gender inclusivity. The super-soft boxer briefs provide heavy protection equivalent to four to five tampons. They have a high-rise fit with a 9-inch inseam and a floating gusset, but they’re still roomy enough to layer with a pad if needed.
The boxer briefs are made from cotton with a touch of spandex for stretch. They’re also PFAS-free and OEKO-TEX certified, so they meet high ethical textile sourcing standards.
While Tomboyx recommends hand-washing and air-drying, you can wash this pair on a delicate cycle and tumble dry on low if you’re in a rush. The boxer briefs are available in seven hues, including solid black and solid black with rainbow logos on the waistband. Sizing varies by color. The solid black comes in 3XS to 6X, whereas the Black Cherry Heather is slightly limited, from XS to 6X. That said, the diverse range of sizes is quite impressive.

Best for Seamless
Knix SuperPlus Leakproof No-Show Bikini
Pros
- Seamless and discreet
- Comfortable fit and attractive design
- Offers three layers of protection
- Available in five absorbency levels
- Inclusive sizing
- Washing machine– and dryer-friendly
- Quick-drying
Cons
- Shorter gusset area
- Air-drying works best
Feel confident in your snug-fitting clothing during your cycle with the Knix SuperPlus Leakproof No-Show Bikini. From workout leggings to white jeans, this pair is discreet and reliable. It features three layers of protection to wick away moisture and keep odors at bay. It’s quick-absorbing to prevent leaks and has a patented bonded interior edge that helps prevent side leaks.
This is one of my favorite pairs I tested. The Knix bikini underwear is lightweight, breathable, discreet, moisture-wicking, and incredibly comfortable. It has an attractive bikini silhouette with a mid-rise fit and medium hip and bum coverage that gave me support. I happily wore this silky, soft pair during my cycle and on any day (or evening). Plus, it’s washing machine–friendly on a cold cycle and can be tumbled dry on low.
Knix has a buy more, save more option so you can stock up. The No-Show Bikini is available in five absorbency levels from essential to ultra, with seven sizes and five color options, including Dark Cherry and Twilight Navy. If you’re looking for a seamless pair of period underwear that feels virtually weightless, this is an excellent choice.

Best for Sleep
Saalt Leakproof Comfort CloudShort
Pros
- Larger and wider protection gusset area ideal for sleep
- High absorbency
- Inclusive sizing
- Buttery soft, sustainably sourced material
- PFAS-free
Cons
- Pricey
- Short style may feel bulky to some
- Not as seamless as some other pairs
There’s nothing worse than waking up to stained sheets during your period, which is why we’re recommending the Saalt Leakproof Comfort CloudShort. This buttery-soft boy short kept my fears at bay, allowing me to catch a solid night’s rest without staining my bedding.
The CloudShort is ideal for high absorbency cycles. It comfortably withstood up to 5 teaspoons of water during my liquid-water testing, and it dried quickly, too. It’s made from PFAS-free Tencel modal, a sustainably regenerated cellulose fiber that comes from renewable beech wood, and it boasts an extra-long and wide front and back gusset for added protection, which is key at night, especially for us back sleepers.
It took me a while to adjust to sporting a period short, so if you’re looking for a discreet pair to wear under jeans, these probably aren’t it. Rather, this period underwear is perfect for nighttime, lounging around the house, or under flowy clothes. I personally loved wearing this as my pajama bottoms at night.
The Saalt Comfort CloudShort is available in super or heavy absorbency with sizing ranging from XXS to 4XL. It comes in five hues, such as Seaspray Green and Rich Ruby. Like the Saalt products above, rinse this pair in water before hand-washing, wash in the washing machine on cold, and always air-dry. For a comfortable period short that can tackle any time of the day (or night), this is it.
Comparison Table
We Also Tested
- Hanes Girls' Period Underwear Hipsters, 6-Pack, Comfort, Period. Moderate Protection: At nearly $30 for six pairs, this pack is definitely a bargain, and the variety of colors is a fun touch. However, Ziegler’s daughter found them itchy, stiff, and uncomfortable. The lack of stretch may not be ideal for people with sensory sensitivities, too.
- Knix Super Leakproof No-Show High Rise Original: While this pair tested well for heavy absorbency, Ziegler ultimately found the gusset to be too bulky and the fit too tight.
How We Tested Period Underwear
To build this guide to the best period underwear, we researched and selected more than a dozen pairs. For over a month, we wore several pairs, observing absorbency, leak protection, odor control, and moisture-wicking properties. We looked at fit, design, cut, ease of maintenance, and how the pairs held up through multiple wears and washings. We also considered sizing, price, and materials.
We interviewed Maral Malekzadeh, MD, a board-certified gynecologist and co-owner of The Well Westlake in Westlake, Ohio, and Kimberlee Coleman, MD, a board-certified obstetrician-gynecologist at Pediatrix Medical Group in Margate, Florida, who provided key medical insight into how period underwear works, what to consider when purchasing a pair, and how to safely wear and maintain a pair.
What to Look for When Buying Period Underwear
When purchasing a pair of period underwear, consider absorbency, style, and color. Those with heavier flows may opt for a pair with maximum absorbency, while those with lighter flows or spotting may gravitate toward a pair with lighter absorbency. Much like traditional underwear, choosing a style or cut and color may come down to preference.
- Absorbency Period underwear comes in different absorbency levels, most commonly ranging from light, moderate, or heavy. However, there is “no standardized industry definition,” explains Dr. Malekzadeh, so “consumers should review each manufacturer’s guidance to determine how much menstrual fluid a product is designed to hold.”
- Style “Style and fit influence both comfort and leak protection,” says Malekzadeh. Full-coverage briefs and high-waisted styles generally provide more protection for heavy flow or overnight use, whereas bikini and thong styles are often better suited for lighter flow or spotting, she adds. The underwear should “fit snugly without being restrictive, as gaps around the legs or waist may increase the risk of leaks.”
- Color Depending on the manufacturer, period underwear is often available in different colors, ranging from white, brown, and black. While color does not affect performance, “darker colors may better conceal staining over time, while lighter colors can make it easier to monitor menstrual flow,” says Malekzadeh.
How Does Period Underwear Work?
Period underwear protects and supports women during menstruation as well as for other protection, including spotting, incontinence, and during pregnancy and postpartum care as needed. Most pairs contain “multiple fabric layers to wick moisture away from the skin, absorb menstrual fluid, and prevent leakage through clothing,” says Malekzadeh.
“The absorbency layer is placed in the gusset area between the legs, directly below the vagina to absorb leakage and flow,” says Dr. Coleman. As fluid is absorbed into the inner layers, the surface closest to the skin is designed to remain relatively dry, improving comfort during wear, explains Malekzadeh.
The design and absorbency levels depend on the manufacturer and the pair. Some pairs have an extended gusset that goes farther posteriorly and anteriorly to prevent leakage during the day and night, and some pairs are entirely absorbent, says Coleman.
What Are the Different Absorbency Levels of Period Underwear?
Period underwear is generally available in light, moderate, heavy, and overnight absorbency levels, says Malekzadeh. Light absorbency is typically intended for spotting, very light flow, or backup protection, while moderate absorbency is appropriate for average menstrual flow. Heavy and overnight styles are designed to hold larger volumes of menstrual fluid and often feature extended absorbent panels for additional leak protection, particularly during sleep, she explains.
“Selecting an absorbency level should be based on an individual’s menstrual flow, planned duration of wear, and intended use,” says Malekzadeh. “Individuals with very heavy menstrual bleeding may still require more frequent changes or additional menstrual products, even when using high-absorbency period underwear.”
How Often Do I Need to Change My Period Underwear?
Period underwear is generally safe to use daily like regular underwear, says Coleman. The recommended length of use is typically found on a manufacturer’s site or on the product label. In general, period underwear can be worn for a few hours or all day, but it’s really up to the person’s comfort level and their menstrual flow, she adds.
Does Period Underwear Contain PFAS?
Period underwear has come under scrutiny for containing PFAS, but it’s complex.
In a 2025 report, the American Chemical Society analyzed 59 period products for fluorine, a potential biomarker for PFAS. Researchers discovered nearly one-third of period underwear contained high levels of fluorine, meaning PFAS were intentionally added. Researchers further tested a subset of the 19 period products. They found all products contained varying levels of PFAS but at lower concentrations.
Many period underwear manufacturers work with third-party labs to test forever chemicals found in fabrics. If you’re concerned about PFAS exposure, consult the manufacturer’s website, reach out to customer service, or select brands with more transparent sourcing.
FAQ
While wearing period underwear can mitigate the constant worry of regularly changing a pad or tampon throughout the day, says Coleman, period underwear can be used with other menstruation products. Tampons, menstrual cups, menstrual discs, or reusable pads offer backup protection on heavier flow days or overnight to reduce the risk of leaks, says Malekzadeh.
Hand-washing is usually most recommended, says Coleman, but some pairs may safely be washed in the washing machine on a delicate cycle. When in doubt, follow the manufacturer’s care instructions.
Absolutely, says Coleman. She says heavy absorbency is often the best choice for overnight protection.
With proper care, “most period underwear lasts approximately two to five years, depending on the quality of the garment, frequency of use, and laundering practices,” says Malekzadeh. If a pair shows signs of reduced absorbency, visible fabric deterioration, or persistent odors after washing, it may be time to replace the pair, she adds.
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Marisa Olsen
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Marisa Olsen is a seasoned food, health, and lifestyle writer as well as a product reviewer and tester. Her work has appeared in several print and digital publications, including E...

Kara Smythe, MD
Medical Reviewer
Kara Smythe, MD, has been working in sexual and reproductive health for over 10 years. Dr. Smythe is a board-certified fellow of the American College of Obstetricians and Gynecolog...

Orlando de Guzman
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Orlando de Guzman is a writer and editor with expertise in health and environmental news. He has a background in investigative and science journalism and has worked on documentary ...

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Katrina Cossey is a writer and editor with over 10 years of experience in broadcast and service journalism. Over her career, she’s covered topics such as the COVID-19 pandemic, new...
Samantha Johnstone
Tester

Marisa Olsen
Tester
Marisa Olsen is a seasoned food, health, and lifestyle writer as well as a product reviewer and tester. Her work has appeared in several print and digital publications, including E...

Ashley Ziegler
Tester
Ashley Ziegler is a full-time writer with extensive experience covering women’s health, babies' and kids' health, mental health, and wellness. Her work has appeared on websites inc...
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