Your comfiest period yet!
The Classic Brief is ultra-soft, made without nasty chemicals, and does the work of 3 regular tampons or pads (without the waste, plastic & chemicals)!
This isn’t just period underwear - it’s a quiet revolution. When you slip into a pair, you’re joining a movement of people who refuse to compromise on comfort or confidence.
You're making a choice that's better for your body AND the planet.
More details on your best period underwear
The go-to choice for anyone wanting ultra-soft, eco-friendly and leakproof period panties that actually work (even for heavy flows!).
Crafted from breathable organic cotton and bamboo fabric, they feel amazing while keeping you dry, fresh, and comfy all day (& night!) long. Our moderate-heavy absorbency holds the same as 3 regular tampons or pads.
Our period briefs are designed for maximum absorbency and ultimate comfort — ideal for everyday wear and those moments where you need to feel like the best version of yourself.
Designed with your flow and lifestyle in mind, the Classic Brief Period Underwear is a game-changer in menstrual care. Whether you’re lounging at home, running errands, or powering through a busy work day, these briefs have got your back (& your front).
You'll Love Our Classic Period Underwear Because
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Leakproof Protection: Multi-layer technology keeps moisture in check even on heavy flow days. Each pair does the work of 3 regular tampons or pads.
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Sustainable Comfort: Made from the softest organic cotton and bamboo, these are better for your skin and the planet!
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Reusable & Washable: These everyday underwear essentials are so easy to care for. Simply wear, wash, repeat!
This is comfort you’ll want to live in, not just during your period.
Shop now and experience your most comfortable cycle yet with our hardworking, super comfy & breathable undies.
FAQs
Period underwear looks and feels like regular underwear, but it’s built with multiple absorbent layers that soak up menstrual flow while keeping you dry and leak-free. Fri Period underwear uses a breathable, multi-layer system designed to absorb period blood, lock in moisture, and prevent leaks - without feeling bulky or diaper-like. We think it's by far the comfiest way to manage your period!
Yes. Fri Period underwear is designed to be worn on its own for light to heavy flow days, depending on the style and absorbency level you choose.
Some also wear them as backup with a cup or tampon for extra peace of mind.
A lot of people choose to wear them in between their period as well so they don't get caught out by suprise leaks.
Absorbency varies by style, but most Fri Period underwear holds the equivalent of 2–4 regular tampons.
Check the product description on each style to choose the best option for your flow.
Yes. Fri Period underwear is made without using PFAS or other harmful chemical treatments. The fabrics are OEKO-TEX Standard 100 certified, which is a giant tick of approval for the safety of the product. The layer closest to your skin is soft, breathable organic cotton, so it's suitable for even the most sensitive skin.
Our materials are tested for safety and skin comfort.
PFAS are “forever chemicals” often used in waterproof fabrics. They have been linked with all sorts of issues, including hormonal irregularities and even cancer. Because period underwear sits against one of the most absorbent areas of your body, choosing PFAS-free options helps reduce unnecessary exposure to chemicals - especially during your period.
Absolutely. Fri Period underwear is designed with sensitive bodies in mind. The organic cotton gusset is breathable, gentle, and free from harsh treatments, making it suitable for even the most sensitive skin and those experiencing their first periods.
Period underwear should fit snugly but comfortably - ike your favorite everyday underwear. It shouldn’t dig in, bunch up, or feel loose around the legs, as a good "seal" helps prevent leaks.
Use the Fri Period size guide and measure your hips for the most accurate fit. If you’re between sizes or prefer a more relaxed feel, we recommend sizing up.
Nope. Fri Period underwear is designed to feel thin, stretchy, and breathable, even on heavier flow days. Most people say it feels just like normal cotton underwear - just way more reliable.
Yes! Fri Period underwear is especially popular for overnight wear. Our high-absorbency styles are designed to protect against leaks while you move, toss, and turn - so you can actually sleep and get those precious ZZZ's.
Yes. Many people wear Fri Period underwear for 8–12 hours, depending on flow and absorbency. On heavier days, you may want to change earlier - just like you would with other period products.
Yes. Many customers use Fri Period underwear for postpartum bleeding, spotting, and light bladder leaks thanks to the absorbent, leak-resistant design.
After wearing, rinse in cold water until it runs clear. Then machine wash cold with your regular laundry and air dry. Avoid fabric softener, bleach, and heat - they reduce absorbency and your Fri Period undies won't hold their shape as long.
With proper care, Fri Period underwear can last 2–3 years or more, making it a reusable, eco-friendly and low-waste alternative to disposable period products.
Some staining over time is normal, but Fri Period designs include thoughtful features like our adorable printed gusset design to help minimize visible staining. Rinsing soon after wear helps keep them fresh, too!
Yes. Fri Period underwear is reusable, designed to replace disposable pads and tampons, and made with responsibly sourced materials and ethical manufacturing practices. Each pair prevents hundreds of tampons or pads from ending up on landfill. Plus, even the packaging is biodegradable and compostable.
Fri Period is made for anyone who menstruates - all ages, sizes, and stages of life.
Whether it’s your first period, your heaviest days, or your comfiest nights, Fri Period is designed to help you feel free.
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Unsure about size? Click here!
Size Guide
Fabric Details
Ethically made without using PFAS or other nasty chemicals.
Our fabrics are OEKO-TEX STANDARD 100 certified, which means they are tested and proven to be free of over 100 harmful substances.
Here are the full details:
Lining: 95% organic cotton, 5% spandex
Outer Layer: 95% natural bamboo, 5% spandex
Inner Core: 80% polyester, 20% nylon with breathable PUL (this part doesn't touch your skin).
For more information about our fabric choices, click here.
Care Instructions
After wearing, rinse in cool water until it runs clear, then machine wash at a low temperature.
Don't use softener or bleach. Hang or lay flat to dry. Discover our best tips and hacks here.
Shipping & Returns
Products are shipped within 1-2 business days. We offer a flat shipping rate and free shipping when you buy 4 or more products.
We offer a 30-day hassle-free return policy from the date you receive your order.
For first-time customers, we also offer a free size exchange - because we get that online sizing can be tricky.
To start a return or request an exchange, drop us a line at hello@friperiod.com with your order number, the item(s) you’d like to return or exchange, and why - your feedback helps us do better.