Masmi Reuse menstrual underwear are made from the healthiest, certified organic cotton GOTS, grown without pesticides, herbicides and chemical fertilizers. Menstrual underwear replaces sanitary pads, tampons and other intimate hygiene products for women. Timeless style and modern design. The front is cut into a V shape to fit the female body. It stands out with low rise and is ideal for women who prefer comfort of underwear that doesn’t show under tight clothes.
Masmi period underwear have been recognized as the best menstrual underwear on the market by independent Allegro experts and other independent rankings – see here:
Menstrual underwear ranking (copy link to browser):
- https://allegro.pl/artykul/ranking-majtek-menstruacyjnych-2024–AgMwdkaYeSW
- https://rankedo.pl/majtki-menstruacyjne-ranking/
- https://terdeals.com/pl/ranking/1965/top-5-majtek-menstruacyjnych
Why choose Masmi organic cotton menstrual underwear?
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100% organic cotton with GOTS certification – this is the healthiest material from which menstrual underwear can be made. It prevents irritation of intimate areas, inflammations, yeast infections or chafing.
- Masmi period underwear are hypoallergenic.
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Masmi Reuse underwear does not “rustle” during wear, because it does not contain foil (polyurethane, polyester, etc.) in the absorbent layer – 100% discreteness and mental comfort for you in any situation.
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Up to 100 washes without loss of absorbency! – As the only brand on the market we provide such a guarantee for period underwear. When following the manufacturer’s washing guidelines, Masmi period underwear will retain its properties even up to 400 washes without loss of absorbency!
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Highest absorbency (up to 77 g) – that’s more than 6 super-size tampons. It guarantees comfort and safety all day or night. No stains on clothes after a full day at work/school and on bedding in the morning.
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Best solution for first periods – high absorbency and long-lasting performance combined with the simplest use compared to tampon application or changing a pad, giving girls unmatched comfort during these important days – just one pair for the whole day at school.
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Excellent in extreme conditions – during training, on trips, on a plane, while traveling, during long meetings or conferences + all other life situations where changing a pad, tampon or emptying a cup may be a problem – you don’t have to give up your plans!
- Sustainable option for women after childbirth, with urinary incontinence, discharge and for women with disabilities – you save time and money with incomparable comfort of use.
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Eco-friendly for the planet – fully biodegradable, no ingredient tested on animals, free from superabsorbents, foils, plastics, artificial fragrances or allergenic components.
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Best economic choice among all intimate care products!
Q&A
Is it worth buying menstrual underwear?
Among women who swapped pads, tampons or cups for menstrual underwear, opinions are very positive. Most admit that Masmi underwear performs well even on the first days of heavy periods.
Do you wear a pad or tampon with the menstrual underwear?
Menstrual underwear are designed to provide protection during menstruation on their own. There is no need to wear an additional pad, but if you feel more comfortable with a pad, you can use it identically to normal underwear. You can also wear the underwear for additional protection during menstruation when using a tampon or menstrual cup.
Are menstrual underwear expensive?
Menstrual underwear are very durable, so their purchase is economical. One pair can last 3-4 years without loss of absorbency. If you follow the manufacturer’s washing and drying guidelines, this period can be up to 6 years (remember that underwear can last even longer, but absorbency may slightly decline – this won’t be noticeable). The cost of tampons or pads over a similar period is 3 to 6 times higher (depending on the brand of pads or tampons) than buying 2-3 pairs of underwear. Additionally, there is incomparable comfort due to longer wear time – 12 h for underwear vs 3-4 h for pads or tampons.
Do menstrual underwear leak?
No, menstrual underwear do not leak as long as used and cared for correctly. However, you should monitor your body and adjust the wear time of the underwear according to your needs depending on the intensity of your period.
Do menstrual underwear feel damp?
If menstrual underwear are washed correctly, they do not lose absorbency and should keep up with absorbing moisture into the absorbent layer.
Do menstrual underwear emit an unpleasant smell?
No, unpleasant odor can sometimes occur when you have a vaginal infection.
How often should I change menstrual underwear?
Change a pad or tampon every 3-4 hours depending on period intensity. Menstrual underwear only need to be changed twice a day.
How many pairs of menstrual underwear should I buy?
We recommend buying 2 pairs. We wear one pair, the other is clean for changing, but if you want to be sure there’s always a clean, washed pair waiting for you on those days, you can get more pairs. The optimal amount is 3 pieces.

tailored to your body - available in 4 sizes: S, M, L and XL
How to wash and care for the products?
- Wash before first use.
- After use, rinse and/or soak before washing.
- Can be washed by hand or in a washing machine with the rest of the laundry or in a separate wash bag (if you prefer).
- If using a washing machine, wash at a temperature not higher than 40º.
- For proper care, use neutral soaps. Do not use chlorine, bleaching agents, fabric softeners, natural oils or Marseille soap, as they may affect absorbency.
- Do not use a tumble dryer, as it may reduce absorbency.
We guarantee unchanged absorbency of our underwear up to 100 washes!
When following the manufacturer’s washing and drying guidelines, Masmi menstrual underwear will retain their properties even up to 400 washes! Reusable hygiene products provide safety, high absorbency, full freedom of movement, great comfort and are also very economical.
composition:
96% certified organic cotton, 4% elastane
absorbent layer: 97% certified organic cotton, 3% PU
The product is hypoallergenic, with 4 certificates: GOTS, FSC, VEGAN and COTTON NATURAL.
in black
vegan-friendly product
made in Spain
NOTE: SIZES OF MENSTRUAL UNDERWEAR, DEPENDING ON SERIES, MAY VARY SLIGHTLY, THEREFORE IF YOUR MEASUREMENTS ARE BETWEEN TWO SIZES, E.G. S and M, WE RECOMMEND CHOOSING THE LARGER SIZE.
THE PRODUCT IS PACKED IN A CARDBOARD PACKAGE SEALED WITH A STICKER. UPON OPENING, FOR HYGIENE REASONS, RETURNS ARE NOT ACCEPTED.
In our store you will also find other Masmi Reuse menstrual underwear models.
The composition and performance parameters of all Masmi underwear models are identical.
- Elegant model – with sheer panels on the sides of the underwear
- Classic model – higher rise (about 1-1.5 cm)
If your periods are very heavy and you need even more protection, we suggest you Masmi Reuse menstrual underwear with increased absorbency:
- with DOUBLE ABSORBENCY (up to 120 g) with low rise
- with TRIPLE ABSORBENCY (up to 166 g) with high rise,
which you will also find in our store.
Masmi and Silver Care products differ only in outer packaging, the product is the same. If one type is out of stock, a substitute from the other brand will be dispatched.
Size: S, M, L, XL
Manufacturer information
Manufacturer: COHITECH COTTON HIGH TECH, S.L., Colonia La Rabeia, S/n, Balsareny Barcelona, 08-660, Spain, info@masminaturalcotton.com
Exclusion from the right of return and exchange: Intimate hygiene products such as menstrual underwear, sanitary pads with wings, panty liners, tampons, menstrual cups, etc., once the packaging has been opened, are not eligible for return or exchange. Legal basis: pursuant to Art. 38 of the Consumer Rights Act of 30.05.2014 and EU Directive 2011/83 of 25.10.2011: The right of withdrawal from a contract concluded away from business premises or by distance does not apply to a contract for the supply of goods which are sealed for health protection or hygiene reasons and which have been unsealed 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!