Masmi Reuse menstrual underwear is made from the healthiest GOTS‑certified organic cotton, grown without pesticides, herbicides or chemical fertilisers. Menstrual underwear replaces pads, tampons and other feminine hygiene products. Timeless style and modern design. The front is cut in a V‑shape to follow the contours of the female body. It has a low rise and is ideal for women who prefer underwear that stays invisible under tight clothing.
Why choose Masmi cotton period panties?
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100% organic cotton with GOTS certification – the healthiest material period underwear can be made from. It means no irritation in the intimate area, no inflammation, fungal infections or chafing.
- Masmi panties are hypoallergenic.
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Masmi Reuse period underwear doesn’t “rustle” when worn, because the absorbent layer contains no film (polyurethane, polyester, etc.) – 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 brand on the market to offer such a guarantee for period panties. When you follow the manufacturer’s washing instructions, Masmi period underwear will retain its properties for up to 400 washes without losing absorbency.
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Maximum absorbency (up to 77 g) – that’s more than 6 super-size tampons. It guarantees comfort and safety throughout the day or night. No marks on your clothes after a full day at work/school and none on your sheets in the morning.
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The best solution for a first period – high absorbency and long-lasting protection combined with the simplest method of use compared with inserting a tampon or changing a pad give girls a level of comfort on these important days that other products simply can’t match – one pair is enough for a whole day at school.
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They perform brilliantly in extreme conditions – during workouts, on trips, on planes, while travelling, during long meetings or conferences + all 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.
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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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Planet-friendly – fully biodegradable, none of the product’s ingredients have been tested on animals, and they contain no superabsorbents, foils, plastics, artificial fragrances, or allergens.
- The best choice in terms of cost‑effectiveness.
Q&A:
Are period panties worth buying?
Among women who have switched from pads, tampons or cups to period underwear, reviews are very positive. Most admit that Masmi panties pass the test even on the first days of the period with heavy bleeding.
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 underwear expensive?
Menstrual underwear is highly effective and durable, making it a very economical purchase. 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 (keep in mind that the underwear can last even longer, but absorbency may decrease slightly—this change 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), compared to buying 2–3 pairs of underwear. Plus, menstrual underwear is incomparably more comfortable to use because it needs to be changed less often—12 hours for underwear vs. 3–4 hours for pads or tampons.
Do your period panties leak?
No, menstrual panties do not leak as long as they are properly used and cared for. However, you should observe your body and adjust how long you wear them according to your flow.
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.
Does your period panties emit an unpleasant odor?
No, unpleasant odor can sometimes occur if you have an intimate infection.
How often should you change menstrual panties?
You need to change your pad or tampon every 3-4 hours depending on your flow – Menstrual underwear only needs to be changed twice a day.
How many pairs of menstrual underwear should I buy?
We recommend buying 2 pairs of underwear. Wear one while the other is clean and ready to go, but if you want to be sure you always have a clean pair during your period, you can get even more. The optimal number is 3 pairs.

shaped to 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 not exceeding 40ºC.
- For proper care, we recommend using neutral soaps. Avoid using chlorine, bleach, fabric softeners, natural oils, or Marseille soap, as they may affect absorption.
- Do not use a dryer to dry your laundry as this may reduce their absorbency.
We guarantee the consistent absorbency of our underwear for up to 100 washes!
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.
In our store you will also find other models of Masmi Reuse period underwear: the composition and technical absorbency parameters of all Masmi underwear models are identical.
- ELEGANT model – with tulle inserts on the sides of the panties
- CLASSIC model – higher waist (by approx. 1-1.5 cm)
If your periods are very heavy and you need even more protection, we recommend Masmi Reuse period underwear with increased absorbency:
- WITH DOUBLE ABSORBENCY (up to 120 g) and a low waist
- TRIPLE ABSORBENCY (up to 166 g) with a high waist,
which you can also find in our store.
Masmi and Silver Care products differ only in external packaging; the product is the same. If one brand is unavailable in your order, the equivalent from the other brand will be sent.
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 period 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 off-premises or at a distance does not apply to contracts concerning goods supplied in sealed packaging which cannot be returned for health protection or hygiene reasons if the packaging has been 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!