SET -3% 2 x Masmi Reusable Period Underwear for Swimming UPF 50+ / chlorine-resistant

Size: XS, S, M, L

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 at a distance does not apply to a contract where the subject of performance is goods supplied in sealed packaging which cannot be returned for reasons of health protection or hygiene if the packaging has been opened after delivery.

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

Masmi menstrual bikini, made with a 100% organic cotton 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 like glyphosate, which can cause irritation or infections. Masmi 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 worry-free time by the water - check Masmi at masmi.com.pl!

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

Masmi menstrual bikini stands out with a 100% GOTS-certified organic cotton absorbent layer (77 g absorbency), unlike competitors that use synthetics. It is tested to ISO 105 standards – resistant to chlorine and salt water, with UPF 50+ UV protection, ensuring safety while swimming and sunbathing. Other swim underwear often lose absorbency after 60 washes, while Masmi guarantees stable absorbency up to 100 washes. Choose unique quality - check at masmi.com.pl!

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

Yes! Masmi bikini is hypoallergenic, made with GOTS-certified organic cotton in the absorbent layer, free from chemicals, perfumes or synthetics that can trigger allergies or irritation. Studies show natural materials reduce the risk of vaginal microbiome disturbances, 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. Experience 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 ensures that the cotton in Masmi bikini comes from organic farming without pesticides or herbicides, and that production is free from toxins like dioxins or chlorine, which studies indicate can enter the bloodstream in 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 Masmi menstrual swim bikini cost-effective in the long run?

Yes! Although the initial price (approx. 104 zł) may be higher than regular swimwear, Masmi bikini is an investment for years. With 77 g absorbency (about 1/4 cup) and durability up to 400 washes (100-wash guarantee), it can last about 5 years (approx. 60 periods), while 10 packs of disposable products cost around 200–300 zł for the same period. You save money and reduce waste - choose the economical solution with Masmi!

6. How does Masmi menstrual swim bikini support intimate health during vacations?

Masmi menstrual swim bikini supports intimate health thanks to organic cotton free from toxins like glyphosate, which can worsen infections, as WHO confirms. The absence of synthetics reduces the risk of TSS and irritation of intimate areas. ISO 105 testing and UPF 50+ protection add safety. Take care of yourself on holiday!

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

Care is simple: wash up to 40°C with neutral soap, no bleach or tumble drying. Rinse before first use, and after swimming rinse in fresh water to remove salt or chlorine. With proper care, Masmi bikini will retain 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 construction and absorbent layers

Menstrual bikini is made from special materials where:

• The absorbent layer retains blood and moisture inside the fabric

• The outer layer is waterproof, preventing leakage to the outside

• Physics at work

When submerged in water hydrostatic pressure acts, which:

• Makes it harder for fluids to flow from the vagina to the outside

• Can temporarily reduce bleeding because water pressure on the body slightly "pushes back" the outflow of blood

• Surface tension of liquids

• Water: has high surface tension (about 72 mN/m at 20°C), which makes it form drops and harder to penetrate materials

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

• A snug fit

Menstrual bikini are designed to fit closely to the body, especially around the groin and buttocks. This reduces:

• The chance of blood flowing out

• Water getting inside

Blood does not flow freely underwater. It’s useful to know that menstrual blood doesn’t "flow" continuously — it comes in waves or drops, often only when changing position or during uterine contractions. During bathing these factors are reduced, so less blood reaches the vaginal canal.

9. Does Masmi menstrual bikini absorb water while swimming?

Masmi menstrual swim bikini does not absorb water while swimming (or absorbs only minimally), because it is made with waterproof materials that prevent outside water from reaching the absorbent layer.

How exactly does it work?

• Outer layer – waterproof. This part acts as a barrier that prevents water from entering

• Absorbent layer – inner. Designed to absorb menstrual blood, not water. It is protected, so it doesn’t have direct contact with water

• Good fit. Close contact with the body prevents "pumping" water inside while swimming

10. Why does menstrual bikini absorb blood yet can be washed?

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

• Inner absorbent layer – made of organic cotton, 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 stains, enabling the removal of blood

• Absorptive properties – the material is designed to absorb thicker fluids (blood), not thin fluids like water