Your Period Panty and Menstrual Underwear Guide
Rethink Your Period Routine: What to Know About Period Underwear
Let’s be honest—periods aren’t always the most convenient part of life. But menstrual care has come a long way, and one product in particular is changing how people manage their cycle: period underwear. If you’ve been curious about it, here’s a friendly guide to help you understand what it is, how it works, and why it might become your new favorite option.
What is a period panty?
So, What Exactly Is Period Underwear?
Period underwear looks and feels like regular underwear but is designed with built-in absorbent layers that can hold menstrual fluid. There’s usually a leak-proof panel sewn into the crotch area that keeps moisture contained and protects your clothes. Think of it like a washable, reusable pad built right into your underwear.
The materials used are key—most include a moisture-wicking layer to keep you dry, absorbent layers that lock in fluid, and a waterproof layer that acts as a barrier against leaks. Some even have odor-fighting technology to help you feel fresh all day.
You can find them in a variety of cuts and styles, including options for light, moderate, or heavy flow days.
Choosing period panties goes beyond comfort; reducing landfill waste from traditional menstrual products is an eco-conscious decision.
- A reliable alternative to pads and tampons, providing peace of mind.
- High-absorbency materials capable of holding several tampons' worth of flow.
- Diverse styles and sizes, extending inclusivity for all body types.
- A win for the environment with dramatically less waste generated.
- Elevate your comfort and confidence, letting you focus on life, not leaks.
Period panties are like regular underwear, but they have a leak-proof panel sewn in the crotch area. Like regular underwear, they are washable and reusable.
You can envision it like a cloth menstrual pad fused to the underwear.
It's all made from cloth and machine washable and reusable.
How Do Period Underwear Keep Leaks in Check?
At first glance, period underwear might seem like magic—but it’s really just smart design. What makes them work so well is a layered system of fabrics that each play a specific role in keeping you dry and protected.
The layer closest to your skin is usually moisture-wicking, helping you stay dry and comfortable. Beneath that, there are absorbent layers that lock in menstrual fluid and move it away from your body. Finally, a leak-resistant barrier on the outside keeps everything contained, so you don’t have to worry about accidents. Some brands even go a step further by adding odor-control features, which can help you feel fresh throughout the day.
What makes them effective:
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Multi-layer design that manages moisture and absorbs flow
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A built-in leak barrier for extra peace of mind
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Soft, breathable materials that keep your skin feeling good
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Odor-resistant features in some styles
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A reusable, eco-friendly option that cuts down on waste
With this kind of thoughtful design, period underwear gives you the freedom to go about your day with confidence—no backup plan required.
How Long Do They Last?
It depends on the brand and your flow, but most period panties provide anywhere from 2 to 12 hours of protection. On a light day, you might be able to wear one pair from morning until night. On heavier days, you may want to switch to a fresh pair halfway through.
Many people find it helpful to have several pairs on hand so they can rotate throughout their cycle. Having a few different absorbency levels also makes it easier to match your underwear to your flow on any given day.
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Vary from 2 to 12 hours of protection depending on flow and brand.
- Light to moderate flows might get all-day use from one pair.
- Recommended to have several pairs for rotation, ensuring continuous comfort.
- Matched absorbency levels for customized protection.
- Awareness of your flow patterns is critical for optimal use.
Washing and Caring for Your Period Underwear
Taking care of period underwear is pretty simple. After wearing, some people like to rinse them in cold water first to help prevent staining. From there, you can toss them in the washing machine on a gentle cycle using cold water and mild detergent. Avoid bleach or fabric softeners since they can break down the absorbent layers.
Air drying is the best way to help them last longer. And while it’s fine to wash them with your regular laundry, some folks prefer keeping them separate—either way works.
Each brand may include specific care instructions, so be sure to check the label or product listing before your first wash.
- Rinse in cold water post-use to prevent stains. (optional)
- Gentle machine wash with cold water and a mild detergent or hand wash.
- Avoid using bleach and fabric softeners to protect absorption.
- Air dry to maintain shape and prevent material damage.
- Store in a cool, dry place away from direct heat or sunlight.
Caring for your panties will extend their life, ensuring they're ready to support you cycle after cycle.
It's up to you to wash your period undies with your regular clothes or separately.
The period underwear will come with care instructions, which may differ from brand to brand, so pay close attention.
If in doubt, choose a delicate cycle for washing and drying (not hot).
Like regular underwear, there are many different materials and styles available.
Are period panties in any way regulated?
Different countries will have various regulations on this. In the US, cloth pads are regulated by FDA rules. By extension, period panties fall under the category of cloth menstrual pads. They are considered a Class I medical device, the lowest risk category.
As you can imagine, while not impossible, it would be improbable to get seriously hurt by a menstrual pad/panty!
Are Period Panties Safe and Free of Toxins?
This is a smart question to ask. Some popular period underwear brands have come under scrutiny for using materials that contain harmful substances like PFAS. If safety is a top concern for you, look for brands that have published third-party lab results to show that their products are free from these chemicals.
A few well-regarded brands offer transparency about their materials and undergo regular safety testing, giving you peace of mind about what you’re wearing.
Getting the Right Fit
Sizing can vary quite a bit between brands. One brand’s medium might fit like another’s large, especially if the products are made overseas where sizing tends to run smaller. When shopping, always check the brand’s size guide and, if possible, take a moment to measure your waist and hips.
Body shape matters too. For example, someone with a curvier figure may find that high-rise or fuller-coverage styles provide a better fit than low-cut options. If in doubt, reach out to the brand’s customer service for help with sizing.
One important tip: if you’ve tried one brand of period underwear, don’t assume your size will be the same in another. Always check the sizing chart before you order.
Styles to Match Your Needs
There’s a wide range of styles when it comes to period underwear, so you’re not stuck with just one option. Here’s a quick look at what’s out there:
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Thongs – Best for light days and minimal visibility under clothes
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Cheekies – A fun, slightly cheeky cut with light to moderate coverage
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Bikinis – A classic cut that balances coverage and comfort
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Boyshorts – Great for nighttime or heavier flow days, with extra coverage
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Hipsters and Briefs – Full-back coverage and a higher rise for maximum security
Some brands also offer hybrid styles that combine features to better suit different body types, such as added room for curves or a more snug fit around the waist.
Browse by Style:
Period Thongs and Cheekies
Period Boyshorts, Briefs, and Hipsters
Bikini Style Period Panties
Period Underwear for Teens and Petites
Period Undies for Size 16/XL and up
Can you use washable period underwear for bladder leaks?
Yes! Reusable period panties also work great for bladder leaks and stress incontinence. Be sure to match your underwear style with your needs. Period thongs will likely not be able to provide adequate protection for stress incontinence.
Are Period Panties a Sufficient Replacement for Traditional Menstrual Products?
Transitioning to period panties may raise the question of whether they can function as standalone menstrual aids. The answer varies from person to person, but many have found that period panties can effectively replace traditional products like pads and tampons, particularly on lighter to medium-flow days.
The comfort level of period panties is unparalleled, as they are made from soft, breathable fabrics without bulky materials. Additionally, there are chemical-free and hypoallergenic options available, offering a healthier choice for your body. However, for heavier flow days, combining period panties with other menstrual products may provide the best protection.
Key benefits of period panties include:
- Designed as a sustainable and comfortable alternative to disposable products.
- Available in various absorbencies to accommodate light to heavy menstrual flows.
- Provides a soft, breathable, and irritation-free experience during menstruation.
- Can be used alone or in combination with other products on heavy days.
- Encourages a more personalized and eco-friendly approach to menstrual care.
The effectiveness of period panties has made them a modern staple in menstrual management, and many users appreciate the freedom and comfort they offer.
Embrace the Change: How Period Panties Streamline Your Lifestyle
Stepping out with confidence during your period was once just a dream, but period panties have made it a reality. They combine innovative technology with comfort, giving you the freedom to fully engage in your everyday activities, no matter where you are in your menstrual cycle.
By choosing period panties, you not only prioritize ease and comfort but also contribute positively to the environment and potentially enhance your menstrual health. It’s time to transform your cycle and experience the unparalleled comfort of period panties today.
The best period panty brands
Most people have heard about the news reports about harmful chemicals found in Thinx brand period panties a few years back. When we chose our supplies, we took great care to select brands of good period underwear our customers could trust.
Listing of available period panty brands listed in alphabetical order:
Aisle Period Underwear
Highlights
- The Lunapads brand has been rebranded to Aisle Period Products
- Made in Canada
- Available up to size 4XL
Consideration
- Higher cost due to higher wages for products made in North America
DominoWear Period Panties
Highlights
- Best panty for curvy booties
- US milled and manufactured
- Fair Wage
- Plant-based, renewable fabric
- Third Party Lab tested and verified to be free of PFOA and PFAS
- Available in US clothing sizes 4 through 18
Considerations
- May not be an excellent fit for very flat booties
- US-made and milled will result in a higher cost for the panty
Flux Period Underwear
Highlights
- Widest range of styles ranging from thongs to boyshorts and bikinis.
- Body is generally a natural fiber blend
Considerations
- Made in Asia
Lola Period Bikinis
Highlights
- Budget Friendly
- Cotton
Considerations
- Limited sizes at this time
- Made in Asia
Proof wide Range of Period Undies
Highlights
- Widest range of styles, from thong to teen to high rise options, great for C-Section scars.
- Body is generally Nylon
Considerations
- Made in Asia
Rael Menstrual Bikinis
Highlights
- Budget Friendly
- Cotton
- Available in US clothing sizes 2 through 14
Considerations
- This brand runs small. Please consult the Rael size chart before ordering
- Made in China
- Limited sizes at this time
Tree Hugger Period Underwear
Highlights
- Huge range of sizes XXS to 3XL
- Canada manufactured
- Fair Wage
- Plant-based, renewable fabric
- Third Party Lab tested and verified to be free of PFOA and PFAS
Considerations
- Available in one style only
We are working on a new chart to include more options and will add it here shortly. In the meantime, you can see our period panty overview chart here.
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