Key Takeaways:
- How Do Period Panties Work: Saalt’s leakproof underwear uses a three-layer system to wick moisture, absorb menstrual flow, and stop leaks before they start. The result is all-day comfort that feels dry, breathable, and reliable, without bulk or irritation.
- Why More People Are Switching: Period underwear offers a reusable option that feels good on your body and is better for the planet. Each pair replaces dozens of disposables, cuts down on waste, and stays soft and simple to care for, cycle after cycle.
- How to Find the Right Fit: With multiple absorbency levels and styles designed for different flows and body types, period underwear gives you the freedom to build a routine that fits your lifestyle, from first periods to postpartum healing.
When it comes to period care, the numbers speak for themselves: billions of disposable pads and tampons end up in landfills each year, yet most of us have simply accepted the same fleeting solutions our parents and grandparents used. It’s one small part of a much larger pattern, expecting discomfort, accepting leaks, and resigning ourselves to a monthly waste cycle, all because better options seemed out of reach.
For many of us, finding something more comfortable, more sustainable, and simply more effective leads directly to reusable solutions, and period underwear is leading that shift. In this guide, you’ll learn how do period undies work, what makes them different from disposables, and why they could be the missing piece in your menstrual care.
How Does Period Underwear Work?
At its core, Saalt Wear period underwear is thoughtfully engineered to absorb menstrual flow and prevent leaks, all while keeping you comfortable and dry. What sets Saalt Wear apart is its patented, multi-layered construction. The top layer is uniquely designed to quickly wick moisture away, leaving you with a dry, breathable feel throughout the day. Beneath that is an absorbent layer capable of trapping fluid equivalent to several tampons or pads—enough to handle light spotting, a typical workday, or even overnight flow, depending on the style and absorbency level.
What sets quality period underwear apart is a third, leak-resistant barrier. This layer stops fluid from seeping through, offering reassurance no matter what your day looks like. Despite featuring multiple layers, the best options stay surprisingly thin and discreet, so you won't feel like you're wearing athletic gear. Advanced materials technology ensures these layers work seamlessly together, allowing airflow while locking in moisture and odor.
Because period underwear is reusable, it’s designed for easy care and longevity. After use, you simply rinse, wash, and air-dry—no special detergents or routines required. By integrating science-backed fabrics and patented construction, period underwear offers a reliable, comfortable alternative to disposable period products. Whether you need all-day security, backup for internal products, or simply want a more eco-friendly routine, the design does the heavy lifting, so you can get back to living your life.
Why People Are Making the Switch
Every period has a different rhythm: early-day gushes, mid-cycle spotting, and late-night leaks. Many of us have tried to manage it with a drawer full of liners, pads, and tampons. Thankfully, period underwear offers a different way forward. Below, we break down how these reusable essentials manage leaks, what they’re made of, and why they’re designed to feel like your favorite pair of underwear.
A Layered System That Keeps You Dry
Still wondering what do period underwear do? Period underwear uses a smart combination of layers to wick moisture, absorb fluid, and stop leaks in their tracks. The top layer, which sits directly against your skin, is moisture-wicking and breathable. This helps pull blood away quickly, so you don’t feel damp or uncomfortable throughout the day.
Underneath, the absorbent core holds multiple tampons' worth of blood—how much depends on the style and absorbency level. For example, some are made for light spotting or discharge, but others can handle overnight flow or postpartum bleeding. These core layers are often made from absorbent polyester blends chosen for both comfort and performance.
To finish it off, a leak-resistant barrier locks in fluid without trapping heat. This third layer is key for keeping your clothes safe during long meetings, gym classes, or overnight sleep. Despite the high performance, the best designs remain thin, flexible, and soft against the body.
Materials That Work With You, Not Against You
The fabrics used in Saalt’s period underwear are medical-grade and intentionally chosen for sensitive skin. You won’t find added fragrances, chemical dyes, or toxins here. Instead, you get breathable textiles like cotton, lyocell, and technical polyester blends that feel like your everyday favorites. These materials stretch and move with you, offering discreet coverage whether you’re sitting in class, heading to work, or managing postpartum healing.
Reliable Absorbency for Every Stage of Life
No two flows are the same. Some people need full coverage for heavy periods, while others want a breathable backup for their menstrual cup or period disc. The beauty of period underwear lies in how flexible and user-friendly it is. You can wear them solo on light or regular flow days. For heavier periods, postpartum bleeding, or bladder leaks, they pair well with internal products for extra protection. And the best part? Care is simple: rinse in cold water after use, toss them in the wash, and hang dry. Once they’re part of your routine, you may wonder why you waited so long to switch.
Go With the Flow With the Right Period Underwear
Periods don’t follow a rulebook, and your underwear shouldn’t have to either. Finding the right pair starts with how your body flows, what your day looks like, and how you define comfort. Saalt’s period underwear is made to adapt, giving you choices across absorbency levels, styles, and life stages. Let’s break down how to pick the perfect fit for your needs, so you feel dry, confident, and covered on your terms.
Start with Your Flow: Absorbency Levels Explained
Some days bring a steady stream, while others are lighter, spotty, or unpredictable. We offer absorbency levels that match how your body changes throughout the week—no guessing, no doubling up.
- Zero Absorbency: Best for non-period days when you want maximum breathability. These pairs don’t absorb flow, so they work best when you don’t need a leakproof lining.
- Light Absorbency: Holds 2+ light tampons or one liner. Designed for spotting, sweat, discharge, or backup to a menstrual cup or period disc. Many use this level for the tail end of their cycle or lighter flow days. If this sounds like a good option for you, how to insert your menstrual disc is a straightforward process.
- Regular Absorbency: Absorbs up to 3 tampons or 2 pads. A great go-to for steady flow days or as backup protection. This level also works for light bladder leaks, offering reassurance without bulk.
- Heavy Absorbency: Holds 4 tampons or 3 pads’ worth of flow. Perfect for overnight use, postpartum needs, or heavier days when your period feels relentless. Also helpful for those dealing with bladder sensitivity.
- Super Absorbency: Designed for the heaviest flow, absorbing 8+ tampons or 6+ pads. A game-changer for postpartum recovery, hormonal shifts, or anyone who wants reliable, long-wear coverage.
Match the Style to Your Needs
Once you’ve figured out your absorbency needs, think about how period undies fit into your actual routine. What you wear on a long shift might differ from what you reach for during a cozy night in. Here’s what to keep in mind:
- High-waisted styles offer full coverage and extra security. Many prefer these for sleeping, postpartum wear, or when they want that tucked-in, held-together feel.
- Hipster and bikini cuts strike a balance between comfort and versatility. They’re ideal for daytime use, workouts, or anyone who wants a go-to pair that blends into any outfit.
- Thongs give you leakproof protection without visible lines—great for light days, cup backup, or period-safe date nights.
If you’re navigating hormonal changes, recovering from a hysterectomy, or experiencing stress incontinence, these flexible styles give you coverage without compromise. Pair them with moisture wicking underwear features for even more breathable, gentle support throughout the day.
Debunking Myths About Period Underwear
There’s a lot of conversation surrounding period underwearand with innovations come new questions–such as how to use period underwear–and sometimes, misconceptions–”does period underwear work?” Let’s address a few of the most common myths so you can make informed choices about your period care.
Myth 1: “Period underwear can’t handle heavy flow.”
Today’s period underwear is engineered for a range of absorbency needs, from light spotting to postpartum bleeding. Multiple high-performance layers work together to wick moisture, lock away fluid, and keep you feeling dry. Some pairs are designed to handle the same amount as several regular tampons, making them reliable even on your heaviest days.
Myth 2: “They’re uncomfortable or bulky.”
Modern designs prioritize fit and comfort. Advances in textile technology mean period underwear can be thin, soft, and breathable, often indistinguishable from everyday underwear in both feel and appearance. With options tailored for various body shapes and preferences, discomfort or bulkiness shouldn’t be part of your experience.
Myth 3: “They smell.”
Odor control relies on both the materials used and proper care. Breathable, moisture-wicking fabrics minimize bacterial growth, which is the main cause of odor. As long as you follow simple care instructions—rinsing in cold water after wear and washing regularly—period underwear stays fresh and neutral for wear after wear.
Myth 4: “Washing is a hassle.”
Washing period underwear is simpler than you might expect. A quick rinse, a gentle machine wash, and air drying are usually all you need. Caring for them fits seamlessly into your routine and, by skipping single-use disposables, you’re cutting back on effort and waste.
Myth 5: “They’re only for people who menstruate regularly.”
Period underwear isn’t just for predictable cycles. They’re a supportive solution for perimenopause, postpartum needs, or anyone managing irregular periods and unexpected leaks. Whether you’re experiencing hormonal shifts, recovering from surgery, or seeking backup for other products, they offer comfort and peace of mind at every stage.
Make the Switch
Understanding how period underwear works is more than just learning about materials and absorbency—it’s about choosing support and freedom during every cycle. At Saalt, we believe you should never have to choose between comfort, confidence, and sustainability, which is why we design every pair of our leakproof underwear to work seamlessly with your body and lifestyle.
Choosing reusable period products is a step toward a cleaner planet and a more equitable future. Every pair of period underwear you wear helps reduce waste, support sensitive skin, and improve access to safe, reliable period care globally. If you’re ready to embrace a new era of period care, know we’re right beside you.
Read more
- How is a Menstrual Disc Different Than a Tampon?
- Are Reusable Menstrual Products FSA/HSA Eligible?
- The Path to Menstrual Freedom: How Saalt Is Answering the Call
Frequently Asked Questions About How Period Underwear Works
Can you wear period underwear for incontinence?
Yes, you can. While period underwear is designed specifically to absorb menstrual flow, it can also offer support for light bladder leaks or stress incontinence. Our leakproof underwear uses multiple absorbent and moisture-wicking layers, making it suitable for both period protection and those moments when you need a little extra security.
Is period underwear safe for all skin types?
Absolutely. We design our period underwear with sensitive skin in mind, using body-safe, non-toxic, and dye-free materials that are gentle and breathable. Our fabrics are carefully selected to help minimize irritation and avoid the use of chemicals that can cause skin reactions in sensitive areas.
Are there any health risks associated with using period underwear?
Used and cared for properly, period underwear is a safe, effective option for menstrual care. Our products are made without added PFAS, fragrances, or harmful toxins. As with any garment, it’s important to wash your underwear regularly, following care instructions, to maintain hygiene and reduce the risk of infection.
Is period underwear comfortable to wear?
We prioritize comfort in every design. Our patented technology allows our leakproof underwear to be remarkably thin and dry, even on your heaviest days. The materials are soft, stretchy, and breathable, made to move with you, so you can feel confident during any activity, whether you're working, exercising, or resting.
Can period underwear be worn without additional protection?
Yes, you can wear period underwear on its own. Many people use our leakproof undies as their only protection, especially on lighter days or at night. For very heavy flow days, you can pair them with a menstrual cup or disc for extra peace of mind. If you’re new to internal products, here’s how to insert a menstrual disc step by step.
How do you wash period underwear?
It’s straightforward: simply rinse your period underwear in cold water after use, then machine-wash on a delicate cycle with mild detergent. Avoid bleach, fabric softeners, and high heat when washing or drying. Hang them to dry for best results—a care method that supports both performance and sustainability.
How often do you need to replace period underwear?
With proper care, our period underwear can last for years. Generally, we recommend reassessing every 2-3 years, or sooner if you notice decreased absorbency or changes in fit and comfort. Regular care helps maintain performance and ensures that your underwear remains hygienic and effective.
Can teenagers use period underwear?
Definitely! Period underwear is an approachable, stress-free option for teenagers. It’s easy to use, provides discreet protection, and reduces the learning curve for period care. Parents and teens alike appreciate that our products are free from harmful chemicals and designed specifically for confident, comfortable wear, no matter where you are in your menstrual journey.
