ActiveMatters Thong in Black
ActiveMatters Thong in Black
Invisible under clothes with raw-cut edges and built-in protection for lighter days.
Style: Thong
on orders over €75
Buy 3+ Save 15%
Buy 6+ Save 25%
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Detail
Detail
The ActiveMatters Collection blends high-performance stretch with barely-there comfort. Designed to move with you, absorb effortlessly, and fuel your freedom. Invisible under clothes and built for reliable protection, holding the equivalent of 1 to 2 regular tampons.
Fit + Fabric
Fit + Fabric
Wear + Care guide
Wear + Care guide
Satisfaction Guarantee
Satisfaction Guarantee
Period Underwear Made for Motion
High-performance period protection that supports your body in motion and disappears under clothes.
Invisible Protection
Super-stretch fabric with raw edges moves with you and stays put, contouring to your body with a smooth, line-free fit that stays invisible, even in leggings.
Made for Motion
Breathable, flexible, and built to move. Designed to keep up through workouts, workdays, and everything in between.
3 Styles. 3 Colors.
Choose your fit: Thong, Brief, or High Waist. Each available in Black, Brown, or Beige to match your activity, outfit, or flow.
Frequently Asked Questions
Everything you need to know about how our period underwear works, how to care for it, and what makes it different.
How does period underwear work?
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.
Is period underwear hygienic?
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.
What are PFAS, and are they used in AllMatters period underwear?
What are PFAS, and are they used in AllMatters period underwear?
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.
How long can you wear period underwear?
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.
Why We Made This
Most period underwear wasn't built for movement. We wanted something different, something that feels as light and flexible as your favorite underwear, but with built-in protection you can count on. So we created the ActiveMatters Collection: soft yet technical, invisible under clothes, and made to move with you. Whether it’s a thong, brief, or high waist, each style is designed to support your body—not get in the way.
Our 2% Pledge
Every year, we pledge to donate AllMatters products for a total value of at least 2% of our annual revenue. In effect, your purchase helps us put safe, reusable period care into the hands of those who need it most, while driving the shift toward a waste-free future. Click on the link below to read more about our mission and commitment.
