Masmi Reuse menstrual underwear with the highest absorption on the market, are made from the healthiest, certified organic cotton GOTS, cultivated without pesticides, herbicides and chemical fertilizers. Menstrual underwear replaces sanitary pads, tampons and other intimate hygiene products for women.
Compared to menstrual underwear from other manufacturers that absorb up to 50 grams of fluid, these eco-friendly menstrual underwear have double absorption: up to 120 grams of menstrual blood.
Ordinary period underwear have one absorbent layer, while these underwear have four breathable absorbent layers made of special 3D fabric, made from organic cotton, ensuring maximum underwear absorption.
Increased absorption (up to 120 g) – that’s more than 8 tampons in the super size. It guarantees comfort and safety all day or night. No stains on clothes after a full day at work/school and on the sheets in the morning.
Masmi period underwear have been recognised as the best menstrual underwear on the market by independent experts Allegro and other independent rankings – see here: menstrual underwear ranking (copy the link to your 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 certificate – to the healthiest material from which menstrual underwear can be made. It prevents irritation of intimate areas, inflammations, fungal infections or chafing.
- Masmi period underwear are hypoallergenic.
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Masmi Reuse underwear does not "crackle" when worn, because it does not contain foil (polyurethane, polyester, etc.) in the absorbent layer – this is 100% discretion and mental comfort for you in every situation.
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Guaranteed up to 100 washes without loss of absorbency! – As the only brand on the market we provide such a guarantee for menstrual underwear. If you follow the manufacturer's washing instructions, Masmi period underwear will retain their properties even up to 400 washes without loss of absorbency!
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Best solution for first periods– high absorbency and long-lasting effectiveness combined with the simplest usage method vs tampon application or pad change give girls an unparalleled comfort in these important days – just one pair for the whole school day.
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Excellent under 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 could be a problem – you don’t have to give up your plans!
- They are an excellent solution for postpartum women, for urinary incontinence, discharge and for disabled women – you save time and money with unmatched wearing comfort.
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They are eco-friendly – fully biodegradable, no component of the product was tested on animals, they do not contain superabsorbents, foil, plastics, artificial fragrances or allergenic components.
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The best economic choice among all intimate hygiene 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 bleeding.
Do you wear a pad or tampon at the same time with menstrual underwear?
Menstrual underwear are designed to provide protection during menstruation by themselves. 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 extra protection during menstruation when you use a tampon or menstrual cup.
Are menstrual underwear expensive?
Menstrual underwear are very efficient and durable, so their purchase is definitely economical. One pair can last us 3-4 years without a drop in absorbency. If you follow the manufacturer’s washing and drying guidelines, this period can extend to even 6 years (remember that underwear can last even longer, but their absorbency will gradually decrease – this process will not be noticeable for 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 underwear. In addition, there is an incomparably greater comfort of wearing underwear due to the longer time between changes – 12 h for underwear vs 3-4 h for pads or tampons.
Do menstrual underwear make you feel damp?
If menstrual underwear are properly washed, they do not lose absorbency and should keep up with absorbing moisture into the absorbent layer.
Do menstrual underwear leak?
No, menstrual underwear do not leak if used and cared for properly. However, you should monitor your body and adjust the wear time of the underwear according to the intensity of your period.
Does intimate underwear give off an unpleasant smell?
No, an unpleasant smell may appear sometimes when you have a vaginal infection.
How often should you change menstrual underwear?
Remember to change a pad or tampon every 3-4 hours depending on period intensity – menstrual underwear only need to be changed 2 times a day.
How many pairs of menstrual underwear should I buy?
We recommend buying 2 pairs. One pair you wear, the other is waiting clean for a change, but if you want to be sure that there will always be a washed and clean pair ready on those days, you can get even more pairs. 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, we recommend rinsing and/or soaking before washing.
- Can be hand washed or machine washed 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, bleaches, fabric softeners, natural oils or Marseille soap, as they may affect absorption quality.
- Do not use a tumble dryer, as this may reduce absorbency.
We guarantee consistent absorbency of our underwear up to 100 washes!
When following the manufacturer’s washing and drying guidelines, menstrual underwear Masmi 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
Hypoallergenic product, with as many as 4 certificates: GOTS, FSC, VEGAN and COTTON NATURAL.
in black
vegan-friendly product
made in Spain
NOTE: SIZES OF MENSTRUAL UNDERWEAR, DEPENDING ON THE SERIES, MAY VARY SLIGHTLY, THEREFORE IF YOUR MEASUREMENTS ARE BETWEEN TWO SIZES, E.g., S and M, WE RECOMMEND CHOOSING THE LARGER SIZE.
PRODUCT COMES IN A CARDED PACKAGING SEALED WITH A STICKER. UPON OPENING, FOR HYGIENE REASONS, RETURNS ARE NOT ACCEPTED.
If your periods are very heavy and you need more protection, we recommend you Masmi Reuse menstrual underwear with even higher absorbency: TRIPLE ABSORPTION (up to 166 g) with a high waist.
In our store you will also find other Masmi Reuse line menstrual underwear models:
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CLASSIC model – higher waist (about 1-1.5 cm)
- ELEGANT model – with tulle inserts at the sides of the underwear
- MODERN model – without tulle inserts at the sides
Masmi and Silver Care products differ only in outer packaging; the product is the same. If one type is not available in an order, a substitute from the other brand will be shipped.
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!