Porous vs non-porous sex toy materials, explained

Porous materials have microscopic holes that trap bacteria, bodily fluids and lubricant — and no amount of scrubbing gets them properly clean. Non-porous materials have a sealed surface you can sterilise completely. The distinction matters everywhere, but it matters most for anal play, where thorough cleaning is not optional.

Silicone, glass, stainless steel and glazed ceramic are non-porous. PVC, TPE, TPR, jelly rubber, "skin-safe rubber" and most things called "realistic" are porous. If the product does not state its material, assume porous and treat it accordingly.

A non-porous toy has a surface dense enough that nothing gets in. Wash it with soap and hot water, or boil it if the manufacturer says you can, and it is sterile. Use it again tomorrow, or lend it to someone else with a fresh barrier, and there is no microbiological carryover. That is what "body-safe" actually means — the material itself does not degrade, leach or harbour anything.

A porous material is full of tiny gaps. Bacteria, faecal matter and lubricant residue sit in those gaps after you have finished cleaning. You cannot see them, you cannot smell them, and they are still there. Some will die on their own; many will not. The toy becomes a reservoir, and every subsequent use reintroduces whatever was left behind.

For vaginal use, that creates a risk of bacterial vaginosis or thrush. For anal use, where the bacterial load is orders of magnitude higher, it creates a certainty. You are not cleaning the toy properly because the toy cannot be cleaned properly. The material is the problem.

This is not about being fastidious. It is about the basic behaviour of the material under a microscope. A porous surface exposed to faecal bacteria will retain faecal bacteria, and soap does not reach into the structure of the material. If you are using something anally and it is made from PVC, TPE or jelly rubber, you are reusing something contaminated every single time.

Of the 110 best-reviewed anal toys in our catalogue, 48 are non-porous — silicone, glass or stainless steel that you can clean properly and expect to last. Another 29 are made from a material that cannot be sterilised: PVC, TPE, TPR or jelly rubber. The remaining 33 do not state a material clearly enough for us to classify them, which in practice means treat them as porous until proven otherwise.

That 29 includes some of the most popular plugs and probes on the market. High review counts, decent scores, materials that cannot be properly cleaned. The market has not caught up with the microbiology, and buyers are still choosing on shape and price rather than on what the thing is made of.

If you are buying for anal use, filter for non-porous materials first and shape second. Silicone is the practical choice for most people — flexible, warm, dishwasher-safe if the manufacturer allows it, and available across the entire price range. Glass and stainless steel are non-porous as well, heavier, harder, and suited to users who want the sensation of something unyielding.

If you already own something porous and intend to keep using it, treat it as single-use without a condom or single-person with a fresh condom every time. Do not share it, do not use it vaginally after anal contact, and replace it every few months regardless of how it looks. The degradation is invisible and the risk is cumulative.

Where a product does not state its material, assume porous. "Body-safe" is not a material. "Skin-safe rubber" is not silicone. If the listing does not say silicone, glass, stainless steel or glazed ceramic by name, it is not one of those things.

Our own catalogue breaks this down product by product — every anal toy we score states its material where the supplier has provided it, and we have filtered the non-porous ones into a list you can shop from directly.

Can you sterilise a porous toy by boiling it? No. Heat kills bacteria on the surface, but it does not close the pores or expel what is already trapped inside the material. A boiled porous toy is a hot contaminated toy.

Does antibacterial soap make a difference? Not structurally. It reduces the bacterial load on the surface, but soap — antibacterial or otherwise — does not penetrate the material itself. The contamination is inside the pores, not on top of them.

Is TPE the same as silicone? No. TPE and TPR are thermoplastic elastomers — porous, prone to degradation, and often mislabelled as silicone in reviews and listings. If the product is cheap and feels slightly tacky, it is almost certainly not silicone.

Can you use a porous toy safely with a condom? Yes, if the condom stays intact and you use a fresh one every time. The condom creates a non-porous barrier between you and the toy. It does not fix the toy, but it contains the problem.

How do you tell if something is actually silicone? Silicone does not smell, does not feel sticky, and does not degrade under heat. If it smells chemical, attracts lint or melts near a flame, it is not silicone. The supplier spec is the only reliable source — if they do not state the material, do not assume.

Material porosity and bacterial retention: Journal of Hospital Infection, vol. 74 issue 3, March 2010, "Bacterial biofilm formation on polymeric implants." Surface structure and cleanability of medical polymers: American Journal of Infection Control, vol. 38 issue 10, December 2010. Silicone as a non-porous elastomer: Biomaterials, vol. 25 issue 27, December 2004, "Surface properties of silicone rubber." Thermoplastic elastomer porosity: Polymer Testing, vol. 29 issue 2, April 2010.

The Snug Report is written and maintained by the team behind Coy, a New Zealand retailer. We spend our days handling this stock, processing the returns and reading what buyers actually say about it. We are not doctors, nurses or sexual-health clinicians, and nothing here is medical advice.

The Snug Report is published by the team behind Coy, a New Zealand retailer that stocks many of the products reviewed here. We say so on every page. Our scores come from aggregated public reviews, not from us — the method is on the methodology page and the evidence count is on every review.