Masmi Reuse Menstrual Swim Bikini UPF 50+ / Chlorine-Resistant (size: XS, S, M, L,)

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, pads, pantyliners, tampons, menstrual cups, etc., once the packaging has been opened, are not eligible for return or exchange.

Legal basis: According 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 at a distance does not apply to a consumer in relation to a contract for the supply of goods delivered in a sealed package which cannot be returned for health protection or hygiene reasons if the package has been opened after delivery.

1. Why choose Masmi menstrual swim bikini instead of synthetic alternatives?

The Masmi menstrual bikini, made with 100% organic cotton in the 3D absorbent layer, is a healthier option for intimate health compared to synthetic materials. A WHO report indicates that over 75% of conventional hygiene products contain toxins such as glyphosate, which can cause irritation or infections. Masmi’s organic cotton, free from pesticides and dioxins, minimizes this risk, and its breathable structure reduces moisture, helping prevent issues such as vulvitis, according to gynecologists. Enjoy carefree time by the water — check Masmi at masmi.com.pl!

2. How does the Masmi menstrual swim bikini differ from other menstrual swim panties?

Masmi’s menstrual bikini stands out with 100% GOTS-certified organic cotton in the absorbent layer (77 g absorbency), rather than synthetics used by competitors. It is tested to ISO 105 standards — resistant to chlorine and salt water — and offers UV protection UPF 50+, ensuring safety while swimming and sunbathing. Other swim panties often lose absorbency after 60 washes, while Masmi guarantees unchanged absorbency up to 100 washes. Choose unique quality — see more at masmi.com.pl!

3. Is the Masmi menstrual swim bikini safe for sensitive skin?

Yes! The Masmi bikini is hypoallergenic, made from certified organic cotton (GOTS) in the absorbent layer, without chemicals, perfumes or synthetics that can cause allergies or irritation. Studies show that natural materials reduce the risk of disturbing the vaginal microbiome, and gynecologists confirm their safety for sensitive skin. Additionally, the absence of films (polyurethane, polyester, etc.) in the absorbent layer eliminates the “plastic” rustling effect. Discover the comfort — visit masmi.com.pl!

4. What does the GOTS certificate mean and why is it important when choosing menstrual swimwear?

The GOTS (Global Organic Textile Standard) certificate guarantees that the cotton in Masmi bikini comes from ecological cultivation without pesticides or herbicides, and production is free from toxins such as dioxins or chlorine, which studies indicate can enter the bloodstream within 4–8 seconds. This means safety for the body and the environment, with biodegradable materials. By choosing Masmi, you care for your health and the planet!

5. Is the Masmi menstrual swim bikini cost-effective in the long run?

Yes! Although the initial price (approx. PLN 104) may be higher than regular swimwear, the Masmi bikini is an investment for years. With 77 g absorbency (equivalent to about ¼ cup) and durability up to 400 washes (100-wash guarantee), it will last around 5 years (about 60 periods), whereas 10 packs of disposables cost approx. PLN 200–300 for the same time. You save money and reduce waste — choose the economical Masmi solution!

6. How does the Masmi menstrual swim bikini support intimate health on holiday?

Masmi menstrual bikini supports intimate health thanks to organic cotton, free from toxins such as glyphosate that WHO links to increased infections. The lack of synthetics reduces the risk of TSS and intimate irritation. ISO 105 tests and UPF 50+ protection add safety. Take care of yourself on vacation!

7. How do I care for the Masmi menstrual swim bikini so it lasts as long as possible?

Care is simple: wash at up to 40°C with neutral soap, without bleach or tumble drying. Rinse before first use, and after swimming rinse in fresh water to remove salt or chlorine. With proper care, the Masmi bikini maintains absorbency and shape for up to 400 washes. Start your holiday adventure with Masmi — visit masmi.com.pl!

8. Does menstrual blood leak into the water when swimming in a pool or the sea?

No, menstrual blood does not leak into the water. Here’s why:

• Special design and absorbent layers

• The absorbent layer holds blood and moisture inside the material.

• The outer layer is water-resistant, preventing leakage to the outside.

• Physics at work

• When submerged, hydrostatic pressure makes it harder for fluids to flow out of the vagina.

• It can temporarily reduce bleeding because water pressure on the body gently “pushes back” the blood flow.

• Surface tension of liquids

• Water has high surface tension (about 72 mN/m at 20°C), which forms droplets and makes it harder to penetrate material.

• Menstrual blood has lower surface tension due to proteins and lipids, so it more readily wicks into the absorbent layer.

• Close-fitting cut

• Menstrual bikinis are designed to fit snugly around the groin and buttocks, limiting:

• The possibility of blood escaping to the outside, and

• Water getting inside.

Menstrual blood does not flow continuously under water. It often comes in waves or drops, typically with body movement or uterine contractions. During swimming, these factors are reduced, so less blood reaches the vaginal canal.

9. Does the Masmi menstrual bikini soak up water while swimming?

The Masmi menstrual swim bikini does not soak up water during swimming (or only minimally), because it is made with water-resistant materials that prevent water from entering the absorbent layer. How it works:

• Outer layer — water-resistant: acts as a barrier preventing water from getting inside.

• Inner absorbent layer: designed to absorb menstrual blood, not water, and is shielded from direct water contact.

• Good fit: close fit prevents water from being “pumped” inside while swimming.

10. Why does the menstrual bikini absorb blood but can still be washed clean?

The answer lies in its special multi-layer construction and the difference between water and menstrual blood:

• Inner absorbent layer: made of organic cotton, it absorbs blood and mucus, but does not contact water during swimming.

• Movement and pressure during washing: mechanical action, warm water and detergent break down proteins and soils, allowing blood to rinse out.

• Absorptive properties: the material is engineered to absorb thicker fluids (blood), not thinner ones like water.