Period Underwear Bikini
Bundle discounts:Buy 3+ save 15%, Buy 6+ save 25%
Experience the freedom of AllMatters Period Underwear. Designed to look and feel like regular underwear, they provide reliable protection during your period.
Made from sustainable materials and ethically produced in Portugal, our period panties offer a comfortable, eco-friendly alternative to disposables.
Available in two Absorbencies:
•Light/Moderate: Absorbs 1-2 tampons worth
•Moderate/Heavy: Absorbs 3-4 tampons worth
Free delivery on +€50 orders. Fast delivery within 2-4 days.
Not happy after 90 days? We will refund you, no questions asked!
Breathable and comfortable
Designed to last, use again and again
Made from the sustainable material TENCEL™
Absorbs your flow while keeping you dry
A leak-free period solution, day and night
No added PFAS or harmful substances
Description
Leak-proof, breathable and eco-friendly period underwear for ultimate comfort and confidence.
Absorbency:
Light/moderate: Holds 1-2 tampons' worth.
Moderate/heavy: Holds 3-4 tampons' worth.
Fit: Flattering design that features high-cut legs and a hip-hugging fit. Mousseline stretch trim at the waist and legs.
How to use
Before the first use, we recommend that you wash the underwear to enhance the functionality of the absorbent layer (just like a towel).
Step 1
Use period underwear instead of pads, tampons or cups, or as a backup for extra protection.
Step 2
After use, rinse in cold water until it runs clear. Machine wash cold (30°) or by hand with a mild detergent. Do not use fabric softener or bleach. Hang to dry.
Step 3
Reuse and repeat – during the day and night!
Materials and fabrics
Designed in Denmark. Made in Portugal.
Materials
Body: 94% TENCEL™ Lyocell, 6% elastane
Inner layer: 77% polyester, 23% merino wool
Absorbent core: 85% TENCEL™ Lyocell, 15% polyester
Waterproof layer: 100% polyester
Disposal
The underwear: Most textiles can be recycled. The collected textiles are sorted and graded as natural, synthetic, and blended fabrics and will be used again.
The packaging: All our packaging is made from recycled and/or recyclable paper and cardboard.
Please make sure to dispose of the packaging in the appropriate bin, according to your local recycling regulations.
Satisfaction guarantee
We offer a full refund on your first pair of underwear if it doesn’t meet your expectations. You can claim the guarantee within 90 days of receiving your order, and this also applies if you’ve purchased the wrong size. Click here to Learn more.
Our other styles
FAQ
Still have questions? Go to full FAQ.
What is period underwear?
Period underwear is an innovative, reusable option for managing your period. It’s designed with multiple layers of high-performance fabric that absorb menstrual flow, keeping you dry, comfortable, and leak-free throughout the day — without the need for pads or tampons.
How does period underwear work?
Our period underwear combines ultra-absorbent materials with leak-proof layers to lock in moisture. It feels just like regular underwear but works hard to keep you protected, no matter your flow. Simply wear, wash, and reuse — no fuss, no waste.
How absorbent is period underwear?
Our AllMatters period underwear comes in two absorbency levels: light/moderate and moderate/heavy, which can hold the equivalent of 1-4 tampons. That means you can choose the right level of protection for your flow, ensuring you feel confident all day.
Can I wear period underwear all day?
Yes! With the right absorbency level, you can wear our period underwear for up to 12 hours, giving you freedom throughout the day (or night) without worrying about leaks. Perfect for busy days, workouts, and even overnight use.
How do I wash period underwear?
Caring for your period underwear is simple. Rinse them in cold water after use, then toss them into the washing machine with your regular laundry (no fabric softener, please). Air dry, and they’ll be ready for the next wear. They’re designed to withstand multiple washes, making them a durable and eco-friendly option.
Is period underwear comfortable to wear?
Our period underwear is designed with comfort in mind, so it feels just like your favorite pair of everyday underwear. Soft, breathable fabrics ensure you stay comfortable, even during your heaviest days.
Can I wear period underwear during exercise?
Yes! Whether you’re going for a run, doing yoga, or hitting the gym, our period underwear provides reliable protection and keeps you dry and comfortable. It’s the perfect solution for active lifestyles.
Is period underwear hygienic?
Absolutely. Our period underwear is made from high-quality, antibacterial materials that ensure hygiene and freshness. Plus, they’re OEKO-TEX certified, meaning they meet high safety standards for fabric use, free from harmful substances.
How long does period underwear last?
With proper care, our period underwear can last for several years, making it a smart investment. Imagine how much money you’ll save by replacing disposable products with a reusable, durable alternative.
What are PFAS, and are they used in AllMatters products?
PFAS (Per- and polyfluoroalkyl substances) are chemicals sometimes used to make fabrics water-resistant or stain-resistant. At AllMatters, we take your health and the environment seriously, so we do not use PFAS in our period underwear. Instead, we focus on safe, non-toxic materials and rigorous testing to ensure quality and safety.
Join our community of 2+ million people
AllMatters is a pioneer within reusable period care. Since our founding in 2012, we've fostered a strong community of like-minded people. Join us on Instagram
More about period underwear
What is period underwear?
Period underwear is a smart solution designed to provide you with security and comfort during your period. The underwear consist of multiple layers of highly absorbent materials that effectively soak up menstrual blood, keeping you dry and comfortable.
They are developed as a sustainable alternative to traditional disposable products like tampons and pads. With proper care, period underwear can be reused for years. At Allmatters, we offer period underwear in two different absorbency levels, so you can choose the model that best suits your flow.
Benefits of period underwear
Period underwear has many benefits. Here are some of the key ones:
• A sustainable choice: Period underwear reduces the amount of waste from disposable products like tampons and pads. By using our reusable underwear, you minimize your environmental impact.
• Economic advantage: Although the initial cost of period underwear is higher than, for example, a pack of pads, you save money in the long run as they can be used over and over again.
• Comfort and convenience: The underwear is designed to be as comfortable as regular underwear. With two different absorbency levels, you can choose the type that best suits your needs, whether you have a light or heavy flow.
• Easy maintenance: The underwear is easy to use and requires minimal maintenance. After use, rinse them in cold water, wash with mild soap or in the machine at 30 degrees, and they are ready to use again once dry.
How many pairs of period underwear do I need?
The number of period underwear you need depends on your flow and how often you want to wash them. A general rule of thumb is to have between 3-4 pairs. This number allows you to change underwear every 8-12 hours, which is our recommended usage time for optimal hygiene and comfort. By having multiple pairs, you can easily switch to a clean pair while the used underwear is being washed and dried.
How long can you wear period underwear?
Period underwear can be worn as long as your flow allows, but for a maximum of 12 hours at a time. Some prefer to use them during the day, while others use them as extra protection along with a menstrual cup or tampon. Generally, it is recommended to use the underwear for 8-12 hours for maximum protection and comfort.
You can also use the underwear at night, for spotting between periods, or for discharge. To ensure that the underwear provides the best protection, you should regularly check if they start to feel wet or if blood is visible at the seams - this is a sign that it is time to change them.
