ActiveMatters Thong in Black

Name: ActiveMatters Thong in Black
Rating: 3.50 (10 reviews)

Invisible Fit
Flexible Stretch
PFAS-Free

Invisible under clothes with raw-cut edges and built-in protection for lighter days.

Color: Black

Style: Thong

Thong Brief High Waist

Size: XS

XS S M L XL XXL

Fast + free shipping on orders over €75

Expert customer support support@allmatters.com

Details

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
Barely there, but built for your period. Features a raw-cut edge, mid-rise fit, and sleek back that disappears under clothes. Made to support you on lighter days without compromise.

Fabric
Body fabric: 77% polyamide, 23% elastane
Inner Layer: 100% polyurethane
Absorbent layer: 90% cotton, 10% polyester
Waterproof Layer: 100% polyester

Wear + Care guide

Step 1
Before the first use, we recommend that you wash the underwear to enhance the functionality of the absorbent layer (just like a towel).

Step 2
Use period underwear instead of pads and tampons or as a backup to your menstrual cup or disc for extra protection.

Step 3
After use, rinse in cold water until the water runs clear. Then machine wash cold (30°) or by hand with a mild detergent. Do not use fabric softener or bleach. Hang to dry.

Step 4
Reuse and repeat!

Disposal
Period Underwear: At the end of their lifespan 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 want you to feel confident trying our products and if something is not right, we’re here to help. Our Satisfaction Guarantee lets you try a pair of AllMatters period underwear risk-free. Try one pair of underwear for up to 90 days and if it does not work for you we'll make it right, whether it’s a refund, a size exchange, or even a whole new product. Click here to learn more.

Delivery + Returns

Free Shipping
We offer free shipping on all orders over €75.

Fast Processing and Delivery
Most orders are shipped the same day and arrive in 4-7 working days. Deliveries to the US and Canada may be slightly longer.

Returns
We offer simple and straightforward returns on all unopened products. Full information can be found here.

Satisfaction Guarantee
We want you to feel confident trying our products, and if something is not right, we're here to help. Our Satisfaction Guarantee lets you try our reusable period products risk-free. Why not make use of it today?

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.

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?

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?

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?

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.

5 stars: 3 (30%)
4 stars: 2 (20%)
3 stars: 3 (30%)
2 stars: 1 (10%)
1 star: 1 (10%)

Some of the reviews shown are from related products the merchant grouped with this one.

Gode trusser - ærgelig farve

Virker skønt, har selvfølgelig mindre sugeevne end andre trusser, fordi det jo kun er en g-streng.
Ville bare lige nævne, at selve suge-delen er helt sort og meget tydelig. Tydelig kant og tydeligt farve skift. Det er lidt nederen når jeg havde købt dem i lyse farver for at kunne vaske med lyse ting, og at billederne på hjemmesiden ikke er helt ærlige med mængden af beige versus mængen af sort.

Genialt

Genialt produkt - elsker at det er slut med engangsprodukter med dette super alternativ uden at man behøver en stor trusse.
Mindre lugt og andre gener end ved bind og tamponer. Både føles og er bedre. Oplever ingen lækage heller. Tak.

Føles rare at have på

De er rare at have på, men måtte gå en størrelse op og var stadig lidt små i det. Jeg kunne også godt have ønsket de kan tåle 40 grader og tørretumbler.

Behagelige, men kort beskyttelsesstykke

Trusserne er meget bløde og behagelige at have på. Desværre er stykket, der opsamler blod, meget kort og dækker ikke meget foran. Hipsters har jeg også, dem bruger jeg gennem hele perioden, da de dækker perfekt!

Skuffende kvalitet

Føler desværre ikke helt pris og kvalitet stemmer overens. Selve samlingen/kanterne på det absorberende lag er ret stiv i det. Jeg synes heller ikke det absorberende lag er højt nok fortil. På trods er de stadig forholdsvis behagelige at have på.

Small in size

Too small in size compared to the other products but unfortunately only found out after unpacking all - otherwise would have been returned.

Dårlig og snyd

Jeg bestilte min pakke for 2 måneder siden og den er stadig ikke kommet og jeg har skrevet mails 3 gange med samme svar, at pakken venter på at blive afsendt… det er snyd ikke køb herfra

De er små i størrelsen i forhold til de almindelige menstruationstrusser.

Very happy with the product

I have 3-4 menstruation pants and this model is the best I have. It is comfortable, you don't feel it on you and it doesn't leak.
Would buy another one.

God service

Jeg modtog en vare med fejl, og fik tilsendt en ny samme dag. Hurtig og venlig korrespondance, og gode produkter!

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.

Why We Exist

Real people. Genuinely helpful support.

When you reach out, whether it's a sizing question, a first-period panic, or a return, you're talking to someone who knows these products inside and out and actually wants to help. We're real people with real experience, and we want you to feel safe and secure using our products.

Contact support

ActiveMatters Thong in Black