

Say hello to your new go-to for heavy days, light days, and everything in between. This is absorbent underwear for women designed to keep up with your life — not slow it down. Whether you’re managing your period, bladder leaks, or postpartum recovery, this pair is built to handle it all with leak resistant protection, buttery-soft comfort, and a whole lot of confidence. Crafted with our ultra-flexible Flow Stretch™ fabric, these womens period underwear hug your body without digging or rolling, moving with you through every twist, stretch, and nap. Inside, a gusset lined with 95% organic cotton — and absolutely made without PFAS — provides breathable, skin-loving softness where it counts most. Designed to absorb up to 9 tampons’ worth of fluid, this is your heavy flow period underwear hero. No backups. No bulk. Just smart, sustainable protection that works. And the best part? One pair replaces hundreds of disposable pads and tampons, saving you money while reducing waste. From teens navigating their first cycle to marathoners chasing finish lines, thousands trust this menstrual underwear for women to keep them dry, confident, and leak-free — without ever sacrificing comfort.
Package Dimensions : 8 x 8 x 1 inches; 5 ounces
Item model number : The Bikini Period for Heavy Flows
Department : womens
Date First Available : April 11, 2025
Manufacturer : Period. By The Period Company
ASIN : B0F4K8DH62
Best Sellers Rank: #221,464 in Clothing, Shoes & Jewelry (See Top 100 in Clothing, Shoes & Jewelry) #332 in Women’s Bikini Panties
Customer Reviews: 4.4 4.4 out of 5 stars (27) var dpAcrHasRegisteredArcLinkClickAction; P.when(‘A’, ‘ready’).execute(function(A) { if (dpAcrHasRegisteredArcLinkClickAction !== true) { dpAcrHasRegisteredArcLinkClickAction = true; A.declarative( ‘acrLink-click-metrics’, ‘click’, { “allowLinkDefault”: true }, function (event) { if (window.ue) { ue.count(“acrLinkClickCount”, (ue.count(“acrLinkClickCount”) || 0) + 1); } } ); } }); P.when(‘A’, ‘cf’).execute(function(A) { A.declarative(‘acrStarsLink-click-metrics’, ‘click’, { “allowLinkDefault” : true }, function(event){ if(window.ue) { ue.count(“acrStarsLinkWithPopoverClickCount”, (ue.count(“acrStarsLinkWithPopoverClickCount”) || 0) + 1); } }); });
8 reviews for The Period Company Flow Stretch Bikini Absorbent Period Underwear for Women Heavy Flow — Leak Resistant Panties Women, Black
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$10.89

CC –
Great pair of period undies
Ordered these for my teen, she gave them a glowing review. The fit was tighter than normal underwear but where these really shined was coverage. She said it was nice not to worry about leaks in the middle of the night. They function better than expected. She liked them so much I ordered three more pairs. The price point is fantastic compared to other pairs! I was able to order three of these for what one pair in a few other brands costs. I washed them on cold and hung to dry and they washed up well. They feel well made with no loose stitching.
AF MILLER –
Panties
The The Period Company Flow Stretch Bikini Absorbent Period Underwear in black is a practical and comfortable choice for women dealing with heavy flow days. The bikini cut feels familiar and flattering, while the stretch fabric moves with you instead of feeling restrictive. What really sets it apart is the absorbent core, which is designed to handle heavier menstrual flow without leaks—so you can go about your day without constantly worrying about replacements or protection.What makes these underwear stand out is how wearable they feel for everyday life. The fabric is soft against the skin and the fit stays smooth under clothes, making them easy to pair with jeans, skirts, or loungewear without feeling bulky. They’re washable and reusable, which not only helps cut down on waste but also makes them a cost-effective option over time. Overall, this pair offers reliable protection with comfort and discreet style, making it a solid backup or alternative to pads and tampons on heavier days.
.::A.R.G::. –
Super Comfortable and Surprisingly Effective
This was my first time trying period underwear, and I was honestly very impressed. These are super comfortable and fit true to size. I ordered a medium and it worked perfectly, with a snug but comfortable fit that didn’t dig in or shift around.The absorbency really exceeded my expectations. The level of absorption and wicking was excellent, especially for heavy flow days. I stayed dry and comfortable and never felt worried about leaks, which made a big difference in confidence throughout the day.The fabric feels soft and breathable, and the waistband stays in place without rolling. They honestly just feel like regular underwear, which is something I really appreciated as a first-time user.Overall, this was a great introduction to period underwear. Comfortable, reliable, and well-made. I would absolutely recommend these and will be purchasing more.
BLANCA –
It leaks
The fabric and the thickness is very good and soft. But unfortionally is not waterproof. It wets when is a bit full. I only tested in 30 ml. And it was soaking all ready
AJPT –
Feels comfortable and works
The Period Company Flow Stretch Bikini underwear is comfortable to wear. It fits well, without pinching, sagging, or bunching up. It is comfortable to wear all day on lighter flow days. It has not leaked when worn overnight or during the day. It rinses out well and washes well. It is functionally absorbent to wear on lighter or heavier days and overnight. I find the value is worth it and will consider purchasing more.
Amazon Reviewer –
Very thick pad, comfortable
I use period underwear and have for years. I typically use a single brand, but ordered these to give them a try and compare them.As far as sizing, these were true to size for me. I’m about 90 lbs and ordered a size XS – they fit perfectly. I did wash them before use. They say they are safe to put in the dryer, but I hang dry all my period underwear so they last longer.These are very soft and conformed well to my body shape. They felt comfortable the entire time I wore them. The only thing I didn’t like is how thick the gusset is. My other period underwear are pretty thin material but still hold a lot of liquid. These do hold a decent amount, but it felt like I had a diaper or pad on at times.Overall, I’m happy with these period underwear though, they didn’t leak, were comfortable, and washed easily after use Be sure to rinse in cold water immediately after you take them off, so they don’t hold any odor.
Helen Akinsola –
High Quality
I was slightly skeptical about these undies, but they are very comfortable and absorb well. Fits as expected, pretty comfortable and I would definitely purchase more of these. Great value and I recommend.
Michael –
Does the job
It fits well and doesn’t “look” like period underwear. Although it doesn’t have as much surface area for the period to soak into. I was afraid of bleeding outside the absorption area at times.