Period underwear with the highest absorbency on the market is made entirely from the healthiest GOTS-certified organic cotton, grown without the use of pesticides, herbicides and chemical fertilizers.
Our panties are a hypoallergenic product, certified with 4 certificates: GOTS, FSC, VEGAN, and COTTON NATURAL.
These are reusable underwear worn during menstruation, replacing pads, tampons, and other feminine hygiene products.
- Compared to menstrual panties from other manufacturers, which absorb up to 50 grams of liquid, these panties have double the absorbency: as much as 120 g of menstrual blood.
- Regular menstrual panties have a single absorbent layer, while these panties feature four breathable absorbent layers made from special 3D fabric, crafted from organic cotton, ensuring maximum absorbency of the underwear.
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Increased absorbency (120 g) – that’s more than 8 super-size tampons. It guarantees comfort and safety all day or night. No marks on your clothes after a full day at work/school and no stains on your sheets in the morning.
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Our panties have been recognised as the best menstrual underwear on the market by Allegro’s independent experts and other independent rankings – see here:
ranking of period panties (copy link to browser):
- https://allegro.pl/artykul/ranking-majtek-menstruacyjnych-2024–AgMwdkaYeSW
- https://rankedo.pl/menstrual-panties-ranking/
- https://terdeals.com/pl/ranking/1965/top-5-menstrual-panties
Why choose Masmi period panties?
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100% organic cotton with GOTS certification – the healthiest material from which period underwear can be made. It means no irritation in the intimate area, no inflammation, fungal infections or chafing. The panties are hypoallergenic.
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Our panties don’t “rustle” when worn, because there is no film (polyurethane, polyester, etc.) in the absorbent layer – 100% discretion and peace of mind for you in every situation.
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Guaranteed up to 100 washes without loss of absorbency! – We are the only company on the market to offer such a guarantee on our panties. If you follow the manufacturer’s washing instructions, Masmi underwear will retain its properties for up to 400 washes without loss of absorbency!
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The best solution for first periods – high absorbency and long-lasting protection combined with the simplest possible use compared to inserting a tampon or changing a pad give girls a level of comfort unmatched by other products on these important days – one pair is enough for a whole day at school.
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They perform brilliantly in extreme conditions – during training, on trips, on a plane, while travelling, during long meetings or conferences, plus all those other life situations where changing a pad or tampon or emptying a cup may be a problem – you don’t have to give up your plans!
- They are an excellent solution for women after childbirth, with incontinence, discharge, and for women with disabilities – you save time and money while enjoying unparalleled comfort of use.
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They are planet-friendly—fully biodegradable, none of the product's ingredients have been tested on animals, and they contain no superabsorbents, films, plastics, artificial fragrances, or allergens.
- The most economical choice of all intimate hygiene products!
Q&A:
- Is it worth buying period underwear?
Among women who have switched from pads, tampons or cups to period underwear, the feedback is very positive. Most admit that Masmi panties pass the test even during the first days of a heavy period. You need to remember to change a pad or tampon every 3–4 hours, depending on how heavy your flow is. Period underwear only needs to be changed twice a day. We recommend buying 2 pairs of panties. You wear one while the other clean pair is already waiting for you, but if you want to be sure that you always have a freshly washed pair ready on those days, you can stock up on even more. The optimal number is 3 pairs.
- Do you use pads or tampons together with period underwear?
Menstrual underwear is designed to provide protection during your period all on its own. No need to wear an extra pad, but if you feel more comfortable with a pad, you can use it just like with regular underwear. You can also wear the underwear as extra protection during your period when using a tampon or menstrual cup.
- Are period panties expensive?
Period underwear is highly efficient and durable, so buying it is definitely economical. One pair can last 3–4 years without losing absorbency. If you follow the manufacturer’s washing and drying instructions, this period can be as long as 6 years (remember that the panties can last even longer, but their absorbency will gradually decrease – this process will not be noticeable to you). The cost of buying pads or tampons over a similar period is 3 to 6 times higher (depending on the brand of pads or tampons used) than buying 2–3 pairs of panties. On top of that, the comfort of using panties is incomparably greater due to the longer time between changes – 12 hours for panties vs. 3–4 hours for pads and tampons.
- Do your period panties leak?
No, period underwear does not leak as long as it is used and cared for correctly. However, you should listen to your body and adjust how long you wear the panties to your needs, depending on how heavy your flow is.
- Does menstrual underwear produce unpleasant odors?
An unpleasant odor may sometimes appear if you have an intimate infection.
- Do you feel wet in your period panties?
If menstrual panties are washed properly, they do not lose absorbency and should continue to wick moisture into the absorbent layer.

designed to fit your body—available in 4 sizes: S, M, L, and XL
How to wash and care for products?
- Wash before first use.
- After use, we recommend rinsing and/or allowing to soak before washing.
- Can be hand or machine washed with the rest of your laundry or in a separate laundry bag (if you prefer).
- If using a washing machine, wash at a temperature no higher than 40º.
- For proper care, we recommend using neutral soaps. Do not use chlorine, bleach, fabric softeners, natural oils or Marseille soap, as they may affect absorbency.
- Do not use a dryer to dry your laundry as this may reduce their absorbency.
We are the only brand on the market that guarantees the constant absorbency of our underwear for up to 100 washes!
If you follow the manufacturer's washing and drying recommendations, Masmi menstrual underwear will retain its properties for up to 400 washes!
Reusable hygiene products ensure safety, high absorbency, complete freedom of movement, great comfort and are at the same time very economical.
composition:
96% certified organic cotton, 4% elastane
absorbent layer: 97% certified organic cotton, 3% PU
A hypoallergenic product with 4 certificates: GOTS, FSC, VEGAN and COTTON NATURAL.
in black
product suitable for vegans
made in Spain
NOTE: SIZES OF MENSTRUAL UNDERWEAR MAY VARY SLIGHTLY DEPENDING ON THE SERIES, THEREFORE, IF YOUR MEASUREMENTS ARE BETWEEN TWO SIZES, E.G. S AND M, WE RECOMMEND CHOOSING THE LARGER SIZE.
THE PRODUCT IS IN A CARDBOARD PACKAGING SECURELY SECURED WITH A STICKER. ONCE OPENED, FOR HYGIENE REASONS, RETURNS ARE NOT ACCEPTED.
If your periods are very heavy and you need even more protection, we recommend Masmi high-waisted period underwear with triple absorbency up to 166 g.
Masmi and Silver Care products differ only in external packaging; the product itself is the same. If one type is unavailable in your order, the equivalent from the other brand will be sent.
Size: L, M, S, XL
Exclusion from the right of return and exchange: Intimate hygiene products such as menstrual panties, pads, liners, tampons, menstrual cups, etc., cannot be returned or exchanged once the packaging has been opened. Legal basis: pursuant to Article 38 of the Consumer Rights Act of 30.05.2014 and EU Directive 2011/83 of 25.10.2011: The right to withdraw from a contract concluded off-premises or at a distance does not apply to a consumer in relation to a contract where the subject of the service is goods supplied in sealed packaging which, once opened, cannot be returned for health protection or hygiene reasons, if the packaging was opened after delivery.
1. How are Masmi period underwear different from other menstrual underwear?
Masmi underwear stands out from the competition thanks to 100% organic cotton with GOTS certification, free from plastic, polyester, or synthetics, which minimizes the risk of irritation and infections (such as vulvitis, TSS), as confirmed by independent lab studies. They offer the highest absorbency (77-166 g vs 25-50 g in other brands) and guarantee absorbency for up to 100 washes (competitors max 60), without any rustling effect when worn or sitting. They are biodegradable and hypoallergenic. Allegro rankings 2022-2024 rated them the best on the market. Experience the difference at masmi.com.pl!
2. Are Masmi period underwear safe for sensitive skin?
Yes, Masmi period underwear is 100% safe for sensitive skin! Made from certified organic cotton (GOTS certified), they are hypoallergenic and free from toxins, pesticides, dioxins, chlorine, perfumes, or superabsorbents that can cause irritation or intimate infections such as vulvitis. Studies conducted by independent laboratories confirm that organic cotton minimizes the risk of allergies and disruptions to the vaginal microbiome compared to synthetic materials. Discover the comfort and safety of Masmi products – check them out at masmi.com.pl!
3. Why should you choose organic cotton over cheaper alternatives?
Organic cotton, like that used in Masmi underwear, is healthier for intimate health because it's grown without chemical pesticides and fertilizers, eliminating the risk of harmful substances entering your body—the vaginal mucosa can absorb them in just 4-8 seconds! On the other hand, synthetic materials like polymers or viscose can increase the risk of irritation, yeast infections, or even long-term issues such as endometriosis, as indicated by research from the American Endometriosis Association. Masmi offers the natural protection that cheaper products simply can't provide.
3. What does the GOTS certificate mean and why is it important?
The GOTS (Global Organic Textile Standard) certificate guarantees that Masmi underwear is made from organic cotton, produced in a way that’s safe for both the environment and your health, without toxic chemicals or heavy metals. It’s a mark of the highest safety standards—no pesticides, dioxins, or chlorine, which minimizes the risk of infections and allergies. Masmi is the only brand to use such strict criteria, making it stand out on the market. Check the details at masmi.com.pl and see for yourself how important this is for your health!
4. Are Masmi period panties cost-effective, given that their price is higher than pads?
Yes, Masmi panties are an investment that lasts for years! One pair is guaranteed to stay absorbent for up to 100 washes, which means up to 5 years (about 60 periods), while 10 packs of pads or tampons only last 10-12 periods. Thanks to absorbency ranging from 77 g to 166 g (much more than the 25-50 g offered by competitors) and no need for frequent changes, you save both time and money. It’s an economical choice in the long run.
5. Can Masmi panties help with health issues like endometriosis?
Yes, Masmi panties can support intimate health, including for those with endometriosis. Organic cotton, free from dioxins and chemicals, reduces the risk of irritation and hormonal disruptions that can worsen endometriosis symptoms—WHO studies show a link between dioxins and this condition. The breathable structure and hypoallergenic properties of organic cotton offer extra protection against infections.
6. How long can I wear Masmi period panties during my period?
Masmi panties are designed for up to 12 hours of use, thanks to absorbency from 77 g (standard) to 166 g (triple absorbency), which outperforms the competition (25-50 g). They’re perfect for day, night, or travel—no need to change every 2-3 hours like with tampons or pads, so you get exceptional comfort. Care for them as instructed (wash up to 104°F/40°C without bleach) and they’ll last for years. Learn more at masmi.com.pl!
7. Are Masmi panties eco-friendly?
Yes, Masmi panties are 100% biodegradable, thanks to organic cotton instead of plastic. They help reduce menstrual waste, which amounts to 500 billion single-use products worldwide every year. The Masmi factory uses solar panels and a closed water cycle to minimize environmental impact. Make a conscious choice—see details at masmi.com.pl!
8. How should I wash Masmi period panties to maintain their quality?
Wash Masmi panties at up to 104°F/40°C with neutral soap, avoiding bleach and tumble dryers. This guarantees up to 100 washes without losing absorbency (up to 400 with proper care). It’s simple and eco-friendly—you’ll find the instructions at masmi.com.pl. Start taking care of yourself and the planet today!
9. Do Masmi panties leak during heavy periods?
No, Masmi panties won’t leak even during heavy periods, thanks to triple absorbency (up to 166 g). That’s more than the standard 25-50 g from competitors, as confirmed by Allegro rankings from 2022-2024. Choose the right absorbency model and enjoy peace of mind—order at masmi.com.pl!
10. Where can I buy Masmi underwear and how do I use a discount?
You can buy Masmi underwear at masmi.com.pl. Discount programs are available on our website for each product. Check out our offer and start your journey with Masmi today!