A menstrual sponge is a soft internal period product that absorbs menstrual flow inside the vaginal canal. There are two main types: reusable natural sea sponges and single-use synthetic menstrual sponges.
They differ in material, cleaning, wear time, removal and whether they are suitable for uses such as period sex. Research on menstrual sponges is limited, so choose a product specifically made for menstrual use and follow the instructions supplied with it.
Key takeaways
- Reusable natural sea sponges are cleaned and reused, while synthetic menstrual sponges are generally designed for one use only.
- There is no universal wear time. Current manufacturer instructions range from around 3–4 hours to a maximum of 8 hours depending on the product.
- Cleaning instructions for reusable sea sponges differ between brands, so use only the method recommended for your particular sponge.
- Research on menstrual sponges is limited and does not allow us to reliably quantify their safety compared with other period products.
- Only some single-use synthetic sponges are specifically designed for penetrative period sex.
- A menstrual sponge is not contraception and does not protect against sexually transmitted infections.
What is a menstrual sponge?
A menstrual sponge is worn inside the vaginal canal where it absorbs menstrual fluid. This differs from a menstrual cup or menstrual disc, which collect fluid rather than absorbing it.
There are two broad categories:
- Reusable natural sea sponges are harvested natural sponges that are cleaned, dried and reused according to the manufacturer's instructions.
- Single-use synthetic menstrual sponges are manufactured absorbent products, commonly made from materials such as polyurethane foam, that are discarded after use.
Natural sea sponges vary in shape, density and texture because they are not moulded products. Some can be carefully trimmed if the manufacturer permits it. Synthetic sponges have more consistent shapes and dimensions, and some include a finger slit or other feature to make removal easier.
Only use a sponge that is sold specifically for menstrual use. Household, cosmetic and bathing sponges are not suitable menstrual products.
You can compare current options in the Menstrual Sponges Comparison Chart.
Reusable sea sponges vs synthetic menstrual sponges
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|---|---|---|
| Type | Reusable natural sea sponge | Single-use synthetic sponge |
| Material | Natural sea sponge | Manufactured material such as polyurethane foam |
| Reuse | Cleaned and reused according to the manufacturer's instructions | Used once and discarded |
| Shape | Naturally variable | Consistent manufactured shape |
| Removal | Usually no string or built-in removal feature | Some have a finger slit or grip feature |
| Cleaning | Required between uses | Not required after use |
| Wear time | Varies by product | Varies by product |
| Period sex | Do not assume suitability | Some products are specifically designed for penetrative period sex |
| Waste | Fewer individual products discarded because each sponge can be reused | Each sponge and its packaging are discarded |
Your choice may depend on your flow, anatomy, comfort with internal products, removal preferences, access to washing facilities and whether you want to manage a reusable product between uses.
Natural sea sponges are also available bleached or unbleached. There is limited evidence showing that one option has a meaningful safety or lifespan advantage over the other, so follow the care instructions for the product you choose.
How do menstrual sponges work?
A menstrual sponge is compressed for insertion and expands or moulds to the vaginal canal while absorbing menstrual flow.
For a reusable sea sponge, the general process is to inspect and clean the sponge as directed, wet it with clean water if instructed, squeeze out excess water, compress it and gently insert it into the vaginal canal.
Remove and clean it within the wear time specified for your product.
Single-use synthetic sponges have their own instructions. Some can be moistened with water or a manufacturer-approved lubricant before insertion, while others are designed to be used directly from the packaging.
Never force an internal period product. Stop if you experience significant pain, burning, pressure or difficulty urinating.
For detailed reusable sponge instructions, see How to Use a Menstrual Sea Sponge Safely.
How long can you wear a menstrual sponge?
There is no single wear time that applies to every menstrual sponge.
Current manufacturer guidance includes:
- Jade & Pearl Sea Pearls: remove after around 3–4 hours, or more often with heavier flow.
- Natural Intimacy: remove and clean at least every 8 hours and more frequently with heavier flow.
- Beppy: generally around 4–6 hours depending on flow, with a maximum of 8 hours.
- Joy Division Soft-Tampons: approximately 3–5 hours on heavier days and up to 5–8 hours on lighter days, with a maximum of 8 hours.
Always follow the instructions supplied with your particular sponge. Remove it sooner if it becomes saturated, starts leaking, feels uncomfortable or causes irritation.
Do not extend the permitted wear time simply because your flow is light.
Some sponge products have wear times that may not cover a full night's sleep, and Joy Division specifically advises against overnight use. If your product's permitted wear time would be exceeded while you sleep, choose another period product overnight.
How do you clean a reusable menstrual sponge?
Cleaning instructions vary between reusable sponge brands, so do not assume that a method recommended for one sponge is suitable for another.
For example, current Natural Intimacy instructions allow particular cleaning methods involving mild soap or specified vinegar or baking soda solutions, while Jade & Pearl provides its own cleaning instructions. These brands also specify limits on ingredients and soaking times.
The safest approach is to:
- follow the instructions supplied with your exact sponge
- use only the cleaning ingredients, concentrations and soaking times it recommends
- rinse thoroughly after using an approved cleaning solution
- allow the sponge to dry completely before storing it
- inspect it before each use for debris, tearing, crumbling or other deterioration
Do not boil a sea sponge, improvise stronger cleaning solutions or use harsh disinfectants unless the manufacturer specifically instructs you to do so.
A cleaned reusable sponge should not be assumed to be sterile.
Are menstrual sponges safe?
The evidence on menstrual sponges is limited. Much of the research is old, laboratory-based or involves small numbers of users, so it cannot tell us the risk associated with every menstrual sponge sold today or reliably compare their overall safety with other menstrual products.
However, several studies and reports have raised issues worth considering.
Historical bacterial research
A 1982 US study compared vaginal bacterial cultures from 25 sea-sponge users with those of tampon and pad users. During menstruation, sea-sponge users had higher rates of several types of bacteria, including Staphylococcus aureus and Escherichia coli.
The study measured bacterial colonisation rather than actual infection, and the number of sponge users was small, so it cannot tell us how frequently modern menstrual sponge users develop health problems.
Historical FDA testing
US Food and Drug Administration testing of natural menstrual sponges in 1980 found sand, grit, bacteria, yeast and mould in some samples, with Staphylococcus aureus detected in one sample.
Historical US reporting also included one case of Toxic Shock Syndrome associated with a sea sponge and another possible case.
Retained sponge case report
A published 2023 case report described a 14-year-old who was found to have a sea sponge embedded in the vaginal wall after ongoing irregular spotting.
A single case does not tell us how often this occurs, but it reinforces the importance of being able to remove an internal sponge comfortably and seeking medical help if a sponge cannot be removed.
2025 chemical analysis
A 2025 laboratory study analysed 64 menstrual and intimate care products, including five sea sponges. In simulated-use testing, the sea sponges released more metals and metalloids than the other product categories tested, including substances such as nickel, cadmium, antimony and mercury.
The researchers also found that many substances detected under more aggressive extraction conditions were not detected under simulated-use conditions. The study measured chemicals released from products rather than health outcomes in people using them.
Australian regulation
At a March 2026 meeting of the Therapeutic Goods Administration's Women's Health Products Working Group, concerns were raised about the access framework and regulation of menstrual sponges in Australia, including discussion about clearer product standards and oversight.
This was an advisory discussion, not a finding that menstrual sponges currently sold in Australia are unsafe.
Taken together, the available evidence supports a cautious approach. “Natural” describes the material rather than guaranteeing safety. Choose a traceable product specifically made for menstrual use, follow its wear-time and care instructions and replace reusable products when they deteriorate.
If the uncertainty around menstrual sponges does not suit you, a menstrual cup, menstrual disc or external period product may be another option. See How to Choose Between a Menstrual Cup, Disc or Sponge for a comparison.
What about Toxic Shock Syndrome?
Toxic Shock Syndrome (TSS) is rare but serious. Historical US reporting included a case associated with a menstrual sea sponge, although current evidence does not tell us how frequently TSS occurs among sponge users.
Symptoms can develop quickly and may include sudden fever, vomiting or diarrhoea, dizziness, confusion, muscle aches or a widespread red rash.
If you think you may have TSS, remove the sponge if you can do so safely and seek emergency medical care. In Australia, call 000 or go to your nearest emergency department.
See our Toxic Shock Syndrome guide for more information.
Can you use a menstrual sponge during period sex?
Some single-use synthetic menstrual sponges, including products from Beppy and Joy Division, are specifically designed and marketed for penetrative sex during a period.
This does not mean every menstrual sponge is suitable for sex. Do not assume that a reusable natural sea sponge can be worn during penetrative sex unless its manufacturer specifically permits this use.
If your synthetic sponge is designed for period sex:
- follow its instructions for insertion, wear time and removal
- discard it after use as directed
- remember that it is not contraception
- remember that it does not protect against sexually transmitted infections
Joy Division advises replacing its Soft-Tampon immediately after intercourse without a condom rather than continuing to wear the same sponge.
For other options, see our period sex guide.
How do you choose a menstrual sponge?
Menstrual sponge sizes and absorbency are not standardised between brands. Compare the actual product dimensions, material, permitted wear time, removal design and care requirements rather than relying only on labels such as “small”, “medium” or “large”.
Your flow
A larger sponge may absorb more fluid, but size is not a standard absorbency rating. If your flow is heavy, you may need to remove or change the sponge more frequently regardless of its size.
Your anatomy and comfort
A sponge should feel comfortable once inserted. Ongoing pain, pressure, burning or irritation are reasons to remove it and reassess.
Removal
Reusable sea sponges generally do not have a string or built-in removal aid, so you need to be comfortable reaching into the vaginal canal and pinching the sponge for removal.
Some synthetic sponges have a finger slit or grip feature. If reaching high into your vaginal canal is difficult for you, a sponge without a removal feature may not be your easiest internal option.
Care and convenience
A reusable sea sponge needs cleaning, rinsing, complete drying and storage between uses. A single-use synthetic sponge requires no cleaning after removal but creates more individual product waste.
The better option is the one that suits your anatomy, flow, comfort and day-to-day routine.
What about prolapse sponges?
Some firmer and denser sponges are sold for pelvic organ prolapse support. These are different from choosing a sponge simply to absorb menstrual flow.
If you think you may have prolapse, seek an assessment from a doctor or pelvic health physiotherapist before choosing a support product.
You can read more about pelvic organ prolapse symptoms and treatment or find a pelvic health physiotherapist in Australia.
When should you stop using a menstrual sponge or get help?
Remove the sponge and stop using it if you experience significant pain, pressure, burning, irritation or difficulty urinating.
Reusable sea sponges should also be replaced if they begin to tear, crumble, thin substantially, change texture or retain an unusual odour after cleaning according to the manufacturer's instructions.
See a healthcare professional if you develop unusual discharge, persistent odour, unexplained bleeding, fever or pelvic pain.
What if you can't remove a menstrual sponge?
A sponge cannot pass through your cervix into the uterus, but it can move higher in the vaginal canal and become difficult to reach.
If you cannot reach it, relax, squat or sit on the toilet and gently bear down as though you're having a bowel movement.
Do not use tweezers, scissors or another object to try to retrieve it. If the sponge remains out of reach, removal is painful or you have caused an injury, seek medical help rather than repeatedly trying to remove it yourself.
If you have recently given birth, had a miscarriage or undergone a gynaecological procedure, ask your healthcare professional when it is appropriate to resume using internal menstrual products.
Menstrual sponge FAQs
Can a menstrual sponge get lost inside you?
No. A menstrual sponge cannot pass through the cervix into the uterus. It can move higher in the vaginal canal and become difficult to reach. If you cannot remove it with clean fingers after relaxing and gently bearing down, seek medical help.
Can you reuse a single-use menstrual sponge?
No. Products such as Joy Division Soft-Tampons and Beppy sponges are intended for one use. Washing and reusing a single-use sponge is not recommended because its hygiene, structure and absorbency after washing are not guaranteed.
Can you sleep with a menstrual sponge in?
Check the instructions for your particular sponge. Some products have maximum wear times that may be shorter than a full night's sleep, and Joy Division specifically advises against overnight wear. Choose another period product for sleep if you would exceed the permitted wear time.
Can you use a menstrual sponge with an IUD?
Check the instructions for your sponge and ask the healthcare professional who manages your IUD if you are unsure whether it is appropriate for you. Some manufacturers specifically advise seeking medical guidance where an IUD string may come into contact with the sponge.
Is a menstrual sponge the same as a contraceptive sponge?
No. A menstrual sponge absorbs menstrual flow. A contraceptive sponge is a different product designed for contraception. Menstrual sponges do not prevent pregnancy.
Are natural menstrual sponges safer than synthetic sponges?
Current evidence does not allow us to say that natural sea sponges are safer than synthetic menstrual sponges or vice versa. They are different products with different materials, care requirements and intended uses. Follow the instructions for the specific product you choose.
The bottom line
Menstrual sponges are soft internal products that absorb menstrual flow. Reusable natural sea sponges and single-use synthetic menstrual sponges differ in materials, care, wear time and removal design, so they should not be treated as interchangeable products.
The safety evidence is limited. Historical and newer research has raised questions about bacterial contamination, retained sponges and chemical exposure, but the available evidence does not tell us the overall risk of using a current menstrual sponge.
If you choose to use one, use a traceable product specifically made for menstrual use, follow its current wear-time and care instructions and seek help if you cannot remove it or develop concerning symptoms.
Use the Menstrual Sponges Comparison Chart to compare reusable and single-use options side by side.
Related reading
- How to Use a Menstrual Sea Sponge Safely
- Menstrual Sponges Comparison Chart
- How to Choose Between a Menstrual Cup, Disc or Sponge
- Toxic Shock Syndrome
- Menstrual Products Comparison Hub
Sources
- Healthdirect Australia, Toxic shock syndrome
- Therapeutic Goods Administration, Women's Health Products Working Group meeting #12, 31 March 2026
- Smith CB et al., Bacterial flora of the vagina during the menstrual cycle: findings in users of tampons, napkins and sea sponges. Annals of Internal Medicine, 1982.
- US Food and Drug Administration, CPG Sec. 345.300 Menstrual Sponges.
- Golub SA et al., The use of "natural" substances for menstrual hygiene: a case report of an embedded vaginal sea sponge, 2023.
- Marcelis Q et al., Chemical characterization of menstrual and intimate care products: an extractables and leachables investigation. Environment International, 2025.
- Beppy, Soft Tampon product information and FAQs.
- Joy Division, Soft-Tampons product information.
This article provides general information and is not a substitute for individual medical advice. Speak with a qualified healthcare professional if you have symptoms, concerns or questions about whether an internal menstrual product is appropriate for you.