Period Boxers

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!

Period boxers are boxer-brief–style period underwear that offer extra coverage through the thighs, combined with built-in absorbent, leak-resistant layers.

Fri Period Boxers are designed for comfort, security, and freedom of movement, especially on heavier days.

Fri Period Boxers are ideal if you:

• Experience leaks through the leg holes
  
• Prefer more coverage and a relaxed fit
  
• Want extra protection while sleeping
  
• Get chafing during your period
  
• Move a lot during the day or night
  

They’re a favorite for heavy-flow days and overnight wear.

Yes. Fri Period Boxers are designed with high absorbency and extended coverage, making them a great choice for heavy flow days and nights.

That’s one of their biggest strengths. The longer leg design helps reduce leaks around the thighs and sides.

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.

No. They’re designed with a comfortable, stay-put fit that moves with your body. The longer leg length helps prevent riding up or bunching.

Yes. The smooth fabric and longer leg coverage help reduce friction between the thighs, making them a great option if you’re prone to chafing during your period (or you can wear them cycle-round).

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.