Yes, period swimsuits are sanitary when used and cared for correctly. The multi-layer gusset is engineered to contain menstrual flow inside the garment rather than releasing it into the water, and the CDC confirms that chlorine effectively neutralises blood-borne pathogens in pool water, with no known cases of infection from blood exposure in a properly maintained pool. With the right product and a simple care routine, period swimwear is as hygienic as any other menstrual protection.
Key Takeaways
- Period swimsuits lock flow inside the gusset. CDC confirms chlorine kills blood-borne pathogens including hepatitis B and HIV, with no known pool infections from blood exposure.
- PFAS are a legitimate concern in some period products. A 2025 ACS study found approximately one-third of period underwear contained PFAS at levels consistent with intentional use, making independent testing essential when choosing a brand.
- Since January 2024, OEKO-TEX STANDARD 100 bans intentional PFAS use in certified textiles, providing a meaningful chemical safety benchmark for shoppers.
- Proper care keeps it sanitary. CDC guidance confirms trapped moisture in period products creates conditions for bacterial growth, so rinsing promptly and washing after every use is non-negotiable.
How Period Swimsuit Hygiene Works
A quality period swimsuit contains a triple-layer gusset: a moisture-wicking inner layer, an absorbent core that traps menstrual flow, and a waterproof outer barrier. That outer TPU barrier is what sets period swimwear apart from a regular swimsuit. Flow is contained inside the garment, not released outward into the water.
CDC guidelines confirm that properly maintained pool water kills most bacteria, including E. coli O157:H7, in under one minute at a minimum of 1 ppm chlorine at pH 7.0-7.8. And according to Clue, menstrual fluids are treated by pool chlorine the same way as sweat and urine. If the gusset contains flow, the pool water never needs to do any work at all.
The Chemical Safety Question
Sanitary also means the materials are safe against your skin. This is where product choice matters. A 2025 peer-reviewed study in ACS Environmental Science and Technology Letters tested 59 reusable feminine hygiene products and found approximately one-third of period underwear contained PFAS at levels indicating intentional addition, with one quarter containing at least 1,000 parts per million of fluorine. Harvard T.H. Chan School of Public Health has linked PFAS exposure to period irregularities, ovarian disorders, and complications during pregnancy.
The fix is simple: choose a brand that publishes independent third-party PFAS test results. OEKO-TEX STANDARD 100 certification from 2024 onward confirms that intentional PFAS use has been tested against a regulated threshold of 100 mg/kg, making it a reliable minimum standard. The American College of Obstetricians and Gynecologists considers period underwear acceptable to use, with the key condition being a quality, tested product.
Why Savvi Wear Is the Tested Choice
Savvi Wear's period swimwear is built on the SavviWear gusset system, a triple-layer design that holds 10-15ml of menstrual flow while the outer waterproof layer repels water from the pool or ocean. On the materials side, the bamboo and bamboo charcoal fabrics have been independently tested by SGS for 630 PFAS compounds, with all tested compounds reported as non-detected (ND). OEKO-TEX STANDARD 100 compliance is provided by the fabric supplier. That is not a marketing claim, it is a documented test result.
The SW-1 Mid Waist Period Swimwear Bottoms are priced at $24.99 and rated 4.87 stars from 132 verified reviews. For heavier flow days, pairing the swimsuit with a menstrual cup or disc gives dual-layer protection. Read the full breakdown in How Does Period Swimwear Work? The Complete Guide.
Frequently Asked Questions
Will period swimwear release blood into the pool?
No. The waterproof outer layer of the gusset prevents menstrual flow from reaching the water. And even if a trace amount did reach the water, pool chlorine kills blood-borne pathogens effectively, with no public health risk identified from blood in pool water.
Can I get a vaginal infection from wearing period swimwear?
The risk is low when period swimwear is used and cared for correctly. A 2022 systematic review in eClinicalMedicine found a modestly elevated risk of Candida infection associated with reusable absorbent period materials, linked to hygiene practices around the product rather than the product type. Rinsing promptly after swimming and washing after each use keeps that risk minimal.
How do I keep period swimwear hygienic?
Rinse in cold water immediately after swimming, then machine wash on a gentle cold cycle with mild detergent. Avoid bleach and fabric softener, which degrade the absorbent layers. CDC menstrual hygiene guidance confirms that trapped moisture creates conditions for bacterial growth, so do not leave wet swimwear sitting unwashed and change out of it as soon as you are done in the water.
How do I know if a period swimsuit is free of harmful chemicals?
Look for brands that provide published third-party PFAS test results, not just a marketing claim of being PFAS-free. OEKO-TEX STANDARD 100 certification from January 2024 onward confirms that intentional PFAS use has been tested against a regulated standard, and is a reliable minimum to look for when shopping.
Conclusion
Period swimsuits are sanitary. The multi-layer gusset contains flow, pool chlorine handles any trace contact with water, and a simple rinse-and-wash routine keeps the garment clean and effective. The one condition: choose a brand that backs its claims with actual test results. Savvi Wear's period swimwear is independently tested by SGS for 630 PFAS compounds, all non-detected, and rated 4.87 stars by 132 verified swimmers - that is confidence grounded in evidence.
Research References
- Intimate hygiene practices and reproductive tract infections: A systematic review. Gynecology and Obstetrics Clinical Medicine, Vol. 2, No. 3 (September 2022). Found that reusable absorbent menstrual materials were associated with a modestly elevated risk of Candida infection (aPRR 1.54, 95% CI 1.2-2.0), underscoring the importance of proper hygiene practices with reusable period products.
- Per- and Polyfluoroalkyl Substances in Reusable Feminine Hygiene Products. Environmental Science and Technology Letters (ACS Publications), Vol. 12, No. 8 (July 2025). Tested 59 reusable feminine hygiene products; found approximately one-third of period underwear contained PFAS at levels consistent with intentional use, with the highest sample reaching 77,000 ppm of fluorine.
- Responding to Blood and Vomit in the Pool. Centers for Disease Control and Prevention (2025). Confirms that chlorine kills germs found in blood including hepatitis B and HIV, and that CDC is not aware of any instance in which a person has been infected with bloodborne pathogens through blood exposure in a pool.
- Home Pool and Hot Tub Water Treatment and Testing. Centers for Disease Control and Prevention (2025). Confirms that chlorine kills most bacteria such as E. coli O157:H7 in under one minute at CDC-recommended concentrations of at least 1 ppm at pH 7.0-7.8.
- Healthy Habits: Menstrual Hygiene. Centers for Disease Control and Prevention, WASH Division (2025). Confirms that trapped moisture in period products creates conditions for bacterial and fungal growth, and recommends regular cleaning of reusable period products per product directions.
- OEKO-TEX New Regulations 2024. OEKO-TEX Association (January 2024). Confirms that from January 1, 2024, OEKO-TEX STANDARD 100 bans the intentional use of PFAS in certified textiles, with total fluorine testing at a limit of 100 mg/kg.
- Questions Raised About PFAS in Period Products. Harvard T.H. Chan School of Public Health (January 2023). Outlines associations between PFAS exposure and period irregularities, ovarian disorders, elevated blood pressure during pregnancy, and risk of low birthweight.
- Can You Swim on Your Period? Clue (2026). Explains that menstrual fluids are treated by pool chlorine the same way as sweat and urine, and that the most common swimming-related illnesses are gastrointestinal and respiratory, not vaginal infections.
- Is Period Underwear Safe and Sanitary? GoodRx Health (2024). Summarises the American College of Obstetricians and Gynecologists position that period underwear is acceptable to use, with commentary from a medical toxicologist on short-duration wear safety.
About the Author
Stephanie Calleja is a marketing and content specialist at Savvi Wear who researches and writes on period health, swimwear, and sustainable care. Her work focuses on making evidence-based period care information accessible and practical for swimmers, athletes, and anyone navigating their cycle with confidence.
Important Disclaimer
Medical Disclaimer: This article is for educational purposes only. Savvi Wear products are designed to manage menstrual flow and are not medical devices. If you have concerns about your menstrual health, consult a qualified healthcare provider.