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Goat Union Overnight Period Underwear for Women Heavy Flow, Leakproof Menstrual Panties Full Coverage, FSA HSA Eligible
Price: | $18.90$18.90
Free Returns on some sizes and colors
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US PERIOD BRIEFS
Brand Size | Waist (in) | Hip (in) |
---|---|---|
X-Small | 23 - 26 | 33 - 35.5 |
Small | 26 - 29 | 35.5 - 38.5 |
Medium | 29 - 31 | 38.5 - 41 |
Large | 31 - 34 | 41 - 44 |
X-Large | 34 - 38 | 44 - 47 |
XX-Large | 38 - 42 | 47 - 50 |
3X-Large | 42 - 45 | 50 - 53 |
4X-Large | 45 - 47 | 53 - 56 |
5X-Large | 47 - 51 | 56 - 60 |
6X-Large | 51 - 55 | 60 - 64 |
Product details
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Fabric typeOuter: 95% viscose made from bamboo, 5% spandex; Outer Mesh: 84% nylon, 16% spandex; Inner: 95% cotton, 5% spandex; Absorbent: 80% polyester, 20% nylon; Leakproof: 100% Polyester TPU
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Care instructionsMachine Wash
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OriginImported
About this item
- Stylish & Full Protection - our full coverage period briefs are moisture-wicking, highly absorbent (they can hold up to 3-4 regular tampons), leak-proof, and breathable. Plus, our front to rear extension, designed for overnight use, eases your anxiety about leaks while you sleep — eliminating the need for a tampon, pad, or cup. No stains and no mess.
- Designed with 4 Highs - high waist, high absorbency, high function, and high material safety. Our fabrics have passed the harmful substance test and have been certified by OEKO-TEX.
- Exercising the 3Rs - Reduce, Replace & Reuse - an ideal alternative to tampons, pads, or cups. Our reusable period briefs reduce and replace the need for single-use menstruation products. Let's start reducing our carbon footprint and being less wasteful in our daily life.
- Fit Tips - we design our own advanced ergonomic sizing system that is true to US sizing, offering a comfortable fit. Please follow our size chart when purchasing. If you are between 2 sizes, order the smaller size for a tighter fit and the larger size for a relaxed fit.
- Use & Care Tips - use our menstrual underwear on days with light, medium, and heavy flow. Pair with an additional menstrual product if needed. Also ideal for postpartum and urinary incontinence uses. Easy to care: rinse and machine-wash cold, gentle cycle, hang dry or extra-low tumble dry. Avoid the high-temperature dryer, bleach, or fabric softener.
- Your Voice Matters - we focus on meeting our customer needs. Your feedback helps us improve our products. If you want to contribute to our size data, reach us at our "Questions" section or Amazon Customer support.
Additional Details


Frequently purchased items with fast delivery
- Sustainability features for this product
Sustainability features
This product has sustainability features recognized by trusted certifications.Safer chemicalsMade with chemicals safer for human health and the environment.As certified byOEKO-TEX STANDARD 100
STANDARD 100 by OEKO-TEX requires every component of a textiles product—including all thread, buttons, and trims—to be tested against a list of more than 1,000 harmful regulated and unregulated chemicals which may be harmful to human health. The assessment process is globally standardized, independently conducted, and updated at least once a year based on new scientific information or regulatory requirements. Certification focus: #ProductSafety and #ChemicalsUsed.Certification NumberSH020 231267
Product Description

Periods are stressful enough without having to worry about stained clothes and sheets. Goat Union understands; that’s why we’ve developed our period underwear with YOU in mind. Our great fit protects from leaks and our high-quality material delivers comfort day and night.


Free-Bleeding – Truly Absorbent & Leakproof

The materials used in our period shorts have obtained certifications from SGS and the STANDARD 100 by OEKO-TEX, ensuring their quality and safety. Furthermore, our products have successfully passed two PFAS laboratory tests, reaffirming their compliance with stringent standards. Note: Certified by QIMA ( Hangzhou) Testing Co., Ltd in 2023 and Bureau Veritas Consumer Products Services ( Guangzhou) CO., LTD in 2023.

about us
Better-fitting and affordable period underwear made with safe, high-quality materials are what all menstruators need. Goat Union is a women-owned brand based in Atlanta, USA, trying to meet that need. We continuously work to create more inclusive period underwear with FitBetter technology. Your feedback and support help us improve and grow – we are all ears.





Don't be afraid to sleep on white bed sheets anymore. #FullCoverage

A front sleeper? ? Must try our full-coverage overnight period brief!! #leak-free sleep

Comfort is one of our design priorities – SUPER soft and comfortable. #weargoatunion

Soft waistband sits comfortably along with your body. #no_digging
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Customer Reviews |
4.4 out of 5 stars 1,519
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4.3 out of 5 stars 107
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4.2 out of 5 stars 170
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4.3 out of 5 stars 130
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4.5 out of 5 stars 1,191
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4.1 out of 5 stars 214
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Price | $18.90$18.90 | $54.00$54.00 | $29.90$29.90 | $16.90$16.90 | $28.00$28.00 | $26.90$26.90 |
Absorbency | Heavy | Heavy+ | Heavy | Light/Medium | Heavy | Heavy |
Rise | High Waisted | Mid Waisted | High Waisted | Mid Waisted | High Waisted | High Waisted |
Full Coverage | ✓ | ✓ | ✓ | Partial | ✓ | ✓ |
Lining Materials | Cotton | Organic Cotton | Organic Cotton | Organic Cotton | Cotton | Organic Cotton |
Body Materials | Viscose made from Bamboo / Spandex | Viscose made from Bamboo / Spandex | Viscose made from Bamboo / Spandex | Organic Cotton Spandex | Viscose made from Bamboo / Spandex | Viscose made from Bamboo / Spandex |
Color | Black | Black / Umber / Smoke Pine | Black / Sand | Rain Washed / Blush / Black | Black | Rain Washed / Blush |
Size Range | XS to 6XL | 2XS to 4XL | M to 6XL | XS to 6XL | 2XS to 6XL | XS to 3XL |
Product details
- Package Dimensions : 7.99 x 7.44 x 1.46 inches; 3.21 ounces
- Department : womens
- Date First Available : September 30, 2020
- Manufacturer : Goat Union, LLC
- ASIN : B08KGTSPWK
- Best Sellers Rank: #36,126 in Health & Household (See Top 100 in Health & Household)
- Customer Reviews:
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From the brand

Goat Union
Embrace your body – Embrace your period.
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"Goat Union: Empowering Menstruators with Better-Fitting, Affordable, and Safe Period Underwear. Atlanta-Based and Female-Owned, we're dedicated to inclusivity and innovation through our FitBetter technology. Your feedback and support fuel our growth and commitment to improvement. We value your voice!"
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Boyshorts Collection
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Fit, Comfort and Safety
Experience Unmatched Comfort: our thoughtfully crafted period essentials deliver safe, soft, and breathable luxury.
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Briefs & Boyleg Collection
Videos
Videos for this product
0:22
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Goat Union - How to Wash Period Brief
Goat Union, LLC
Videos for this product
0:21
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Goat Union - Overnight Period Brief Heavy Flow
Goat Union, LLC
Videos for this product
0:42
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Goat Union | Top Period Facts We Should Know
Goat Union, LLC
Customer reviews
Customer Reviews, including Product Star Ratings help customers to learn more about the product and decide whether it is the right product for them.
To calculate the overall star rating and percentage breakdown by star, we don’t use a simple average. Instead, our system considers things like how recent a review is and if the reviewer bought the item on Amazon. It also analyzed reviews to verify trustworthiness.
Learn more how customers reviews work on AmazonCustomers say
Customers appreciate the underpants for their comfort, leakage protection, and design. They find the underpants soft, similar to swim bottoms, and snug to prevent leaks. Many appreciate the absorbency and coverage of the underwear. The mesh detail is also a draw for some customers. While most customers find the functionality and value for money good, there are differing opinions on the fit and drying time.
AI-generated from the text of customer reviews
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Customers appreciate the underpants' comfort. They find them soft, well-constructed, and similar to swim bottoms. The absorption area is great, and they feel like wearing nothing at all. The fit allows for weight fluctuations and allows for long-lasting wear.
"...Feel: Bambody, Goat Union, Unders. The Bambody are the softest and have the best stretch...." Read more
"...I love that it isn't a tight elastic band, so it is comfortable for days I'm extra bloated...." Read more
"...My first impression was just that these are such good quality and so comfortable. And it works! I also prefer to support small, women owned business...." Read more
"...These undies definitely check all of the boxes. They are super soft and comfy, similar to jersey cotton, stretchy, and thin enough to not feel like..." Read more
Customers appreciate the leakage protection. They mention the underpants are snug to prevent leaks, but some find them too tight.
"...Goat Union feel much less likely to leak overnight, though none of them have leaked on me yet. Smell: Unders, Goat Union, Bambody...." Read more
"...coverage comes all the way up the front and back, so there aren't any leakage issues, and I can wear at night...." Read more
"...These are my favorite for sleeping. I had no leaks and felt very secure. I love that goat union has the extended padding in the front area...." Read more
"...days as they make our cramping and anxiety worse, and these have not leaked or felt too tight on our tummies...." Read more
Customers like the design of these underpants. They are comfortable, breathe well, and have a cute little mesh strip. The underwear is great for heavy flow, absorbent, and has no diaper look. Many customers appreciate the quality, comfort, and fit.
"...Aesthetic: Bambody, Goat Union, Unders. The Bambody are the best looking on my body, and they come in a few different colors which is nice, while..." Read more
"...My first impression was just that these are such good quality and so comfortable. And it works! I also prefer to support small, women owned business...." Read more
"...I ordered a size Small and they looked huge. The quality seemed good...." Read more
"...Yes, they are a little more expensive, but the coverage and quality are no match for the Goat Union ones." Read more
Customers appreciate the absorbency of these underpants. They like the large absorbing channel that runs front to back. The absorbent gusset covers the entire area for complete coverage.
"...I LIKE the Goat Union better, their biggest draw is that huge absorbing channel that goes all the way up to the mesh line in the front and back,..." Read more
"...They have full booty coverage, not cheeky at all. 2. Absorbency: Very absorbent. The first 2 days of my period are my heaviest...." Read more
"...So incredible having the peace of mind that the absorbent gusset runs completely front to back so you are fully covered...." Read more
"...I love the coverage of the absorbent area, however, I do need to use a reusable pad on my heaviest days. (I found this out the hard way.)..." Read more
Customers appreciate the period underwear's functionality. They find them absorbent and work well for heavy flow. The sizing is accurate, and they can be washed and dried without issues.
"...isn't as good as the Unders in that category, they still do a pretty good job." Read more
"...I am 32 years old and have never been able to say that. This is a wonderful product and would recommend it to anyone and everyone...." Read more
"...yes theyre a bit expensive but they work so well. i want to slowly phase out my pads and go for period undies while im at home...." Read more
"...But for the next cycle, I wore them overnight on my heavy day and had no issues. Then I wore my second pair for about 5 hours and no leakage...." Read more
Customers appreciate the value for money of these underpants. They find them to be of good quality for the price, providing full coverage and helping reduce cramping.
"...They are really worth the price. I have noticed less cramping since wearing these at the beginning of my periods and they just feel more comfortable..." Read more
"...This is a great product and worth the price." Read more
"...Seem like great quality for the price...." Read more
"...Yes, they are a little more expensive, but the coverage and quality are no match for the Goat Union ones." Read more
Customers have different views on the fit. Some find it great, with a good fit that doesn't ride up or slide down, breathes well, and fits high on the waist without being too tight or loose. Others say it runs slightly small if you have a booty and hips, and seems enormous once they are on. They also mention it's less comfortable to move in than normal underwear and that the crotch area should be wider for better coverage.
"...1. Fit: they fit high on my waist, but I love that it isn't a tight elastic band, so it is comfortable for days I'm extra bloated...." Read more
"...I ordered a size Small and they looked huge. The quality seemed good...." Read more
"...The fit was on point for me. I am between a medium and large and usually go for large as I do not like any clothing cutting into me in any way...." Read more
"...panties to accommodate our heavy flow with intense cramping, high rise fit preference, option to wear overnight, and not trigger sensory overload...." Read more
Customers have different experiences with the drying time of the underpants. Some find them comfortable and dry quickly, with excellent moisture-wicking and no leaks. Others mention that they take a while to dry out, as they absorb sweat.
"...I barely notice what they're doing and the moisture-wicking is excellent, though I do occasionally feel a rustle when I'm moving in the butt area..." Read more
"...I also felt that the gusset in these felt wetter than some other period underwear brands, especially on heavy days...." Read more
"...ZERO LEAKS! and you don't have that wet feeling...." Read more
"...They can sometimes take a while to dry, but I have found that running them for a while in the dryer on a lower heat, then hanging to finish drying..." Read more
Reviews with images

Trying three brands but this is a winner for natural fabric
Top reviews from the United States
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- Reviewed in the United States on March 8, 2023Size: LargeColor: Black Heavy X2Verified PurchaseI have tried three different kinds of period underwear as an alternative to pads with the hopes of being more environmentally friendly. I have never used tampons, because I have a tilted uterus and find tampons uncomfortable, so my opinion on the comfort of period underwear comes from previously only using pads. When comparing pads vs. period underwear, the period underwear wins, no matter the brand, they are all more comfortable than pads. Of the three brands I have tried, these Goat Union ones are my favorite. The other two brands I have tried are Unders and Bambody.
Below I'll rank the brands in order from best to worst in a few categories:
Fit: Goat Union, Bambody, Unders. The Unders ones are the only ones I don't like the fit of, as they roll down and dig into my c-section scar. Goat Union are a really high waist (over the belly button), and Bambody are a little below the belly button. I like the higher waist and the cut on the leg holes best on the Goat Union. For reference, I'm a US size 12 and ordered a Large.
Feel: Bambody, Goat Union, Unders. The Bambody are the softest and have the best stretch. All three stay about equally dry feeling on a heavy day.
Price: Bambody, Goat Union, Unders. You get three pairs of Bambody for the price of one Unders, and slightly more than the price of two Goat Union.
Absorption: Goat Union, then a tie between Bambody and Unders. All three can deal with a full night heavy flow for me, but the Goat Union have a much larger area with the absorbent layers. I love that the absorbing area goes all the way up high in the front and the back, rather than just in the lower gusset area like Bambody and Unders. Goat Union feel much less likely to leak overnight, though none of them have leaked on me yet.
Smell: Unders, Goat Union, Bambody. This is honestly a big one, especially if you don't work from home. On heavy days the Bambody will start to smell after about 2 hours, and Goat Union after about 4-5, while the Unders can go 6-8 without smell. And it's just impractical to change underwear every 2 hours if you are at work or school.
Aesthetic: Bambody, Goat Union, Unders. The Bambody are the best looking on my body, and they come in a few different colors which is nice, while Goat Union and Unders are only in black. The biggest thing that made Goat Union not rank first in this category though, was the weird mesh strip below the waist band. Not only does it just look kind of weird, but it also is like a weird peek-a-boo window for my stretch marks, and while I don't hate my stretch marks, I don't exactly like to highlight them either.
Although Bambody technically won in more categories than Goat Union, I LIKE the Goat Union better, their biggest draw is that huge absorbing channel that goes all the way up to the mesh line in the front and back, it makes them feel so much more secure than the other two brands, at least for me. The smell absorption is another big one, it's the place where Bambody really fails wearers, and while Goat Union isn't as good as the Unders in that category, they still do a pretty good job.
- Reviewed in the United States on March 20, 2022Size: SmallColor: Black Heavy X2Verified PurchaseFor sizing reference: I purchased size Small, I'm 5'4", and 109 lbs. 36" hips, and 26" waist
I LOVE these! I wanted to make the switch to period underwear since I was a pad user anyway, and wanted to cut down on waste. I did a lot of research, reading different articles comparing different brands. I ultimately went with this brand and other because of price and review. I'm so glad I got these to compar, and I ended up buying more of this brand because I liked them so much.
1. Fit: they fit high on my waist, but I love that it isn't a tight elastic band, so it is comfortable for days I'm extra bloated. They have full booty coverage, not cheeky at all.
2. Absorbency: Very absorbent. The first 2 days of my period are my heaviest. I was using 3 pads each day. Now, I can use 2 pair of these on the first day instead, and usually1 pair a day the rest. The absorbency coverage comes all the way up the front and back, so there aren't any leakage issues, and I can wear at night.
3. Cleaning and care: The care instructions it comes with are right on! Follow them! Use COLD water. Hot water helps blood to adhere to material, I think it has to do with proteins(don't quote me on that science), so using hot water won't clean it properly, and you may have smell issues. What I do is, when I take them off, immediately rinse until clear under cold water, then soak in clean cold water with about a cup of vinegar for 20 min. Then ring out, and let air dry a bit so they arent soaking wet when I wash them. Then, I put in the wash alone, just the underwear, on a cold water cycle, with a cup of vinegar and like 2TBS laundry sanitizer. Never dry in dryer, only hang to dry. I've been using since August of 2021 and they don't have any odor and fit the same as when I got them!
These have been life changing! I no longer feel like I have a diaper on or that people could hear or see the pad outline. (I was wearing long super absorbent). I feel confident and normal during my period!
Top reviews from other countries
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Michelle L.Reviewed in Mexico on November 20, 2024
5.0 out of 5 stars Increíble producto
Size: 4X-LargeColor: Black Heavy X1Verified PurchaseCompré diferentes productos/marcas para probar y me enamoré de este producto. Increíble calidad y funciona muchísimo. Compré más!!
- B.Reviewed in Canada on March 3, 2023
5.0 out of 5 stars Run Large
Size: 4X-LargeColor: Black Heavy X2Verified PurchaseI ordered a size according to the measurements on the chart (4X), and they’re waaay too big. Having said that, I’ve worn them anyway to see how they are, just putting a proper fitting size of underwear over them. I like the way they feel; the fabric is soft and comfortable. No issue with leakage either. I’ve ordered down a couple of sizes (2x) and hope the next ones fit better. For the ones I have now, I think I’ll actually take them in on the sides just so I can still use them. So far my experience is that I’d recommend these.
- VMan58Reviewed in Australia on May 29, 2023
5.0 out of 5 stars Nice underpants
Size: 4X-LargeColor: Black Heavy X2Verified PurchaseDislike the leg it was loose so it rides up your bum it could be a bit titer but I like them thank you
- chinasaReviewed in Canada on July 11, 2024
5.0 out of 5 stars Great Period Underwear!
Size: X-LargeColor: Black Heavy X2Verified PurchaseGreat Period Underwear! Provided full protection overnight. I didnt leak once! I would buy more! Highly recommend.
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AdrianaReviewed in Mexico on August 21, 2022
5.0 out of 5 stars Absorbentes
Size: 3X-LargeColor: Black Heavy X1Verified PurchaseMi cadera mide 125 y pedí 3xl me quedaron perfectos , absorbieron muy bien y no tuve fugas , su cubierta delantera llega hasta arriba y eso es muy bueno .