Condom Types and Materials Explained (UK Guide)

Not all condoms are made of the same stuff, and the difference matters. Latex, polyisoprene and polyurethane condoms all reduce the risk of STIs when used correctly. Lambskin condoms do not, because the natural membrane is porous enough to let viruses through. Here is how the materials and features compare.

Condom materials compared

Material	STI protection	Allergy notes	Oil-lube safe	Vegan notes
Latex	Yes, used correctly	Not for latex-allergic users	No, oil damages latex	Plant-derived, but not always vegan if casein or other animal-derived aids are used. Check the pack.
Polyisoprene	Yes, used correctly	Good latex-free option	Follow the pack; generally treat like latex	Usually vegan if no animal aids. Check the pack.
Polyurethane	Yes, used correctly	Good latex-free option	Less oil-sensitive than latex, but follow the pack	Usually vegan if no animal aids. Check the pack.
Lambskin (natural membrane)	No, does not block STIs	Not a latex issue; it is animal tissue	STI risk is the bigger limitation	Not vegan; it is animal-derived.

Types and features

Feature	What it does	Evidence
Ribbed / dotted	Adds texture for sensation	Mostly a pleasure claim, not a proven medical benefit
Ultra-thin	Aims to increase sensation	No evidence that quality-tested thin condoms break more easily
Flavoured	Made for oral sex	Do not assume they suit other intercourse unless the pack says so
Warming / tingling	Lubricant that creates a sensation	A sensation claim; extra ingredients may irritate some people
Delay	Adds a numbing agent such as benzocaine or lidocaine	Can help delay ejaculation; not a treatment for underlying issues
Spermicidal	Adds spermicide, often nonoxynol-9	Generally no advantage; spermicide can irritate tissue and adds nothing to STI protection
Large / snug	Changes the fit	Genuinely relevant: fit affects comfort, breakage and whether it stays on
Glow / novelty	Cosmetic or novelty	About preference, not protection

Myth versus fact

Myth	Fact
Thinner condoms are weaker.	Not if they meet quality standards. Thinness alone does not mean more breakage.
Lambskin is the safest, most natural option.	Lambskin does not protect against STIs. It is porous to viruses.
Any condom works with oil-based lube.	Oil-based lubricant can weaken latex and cause splitting. Use water- or silicone-based instead.
Non-latex condoms are second-rate.	Polyisoprene and polyurethane are legitimate latex-free options for allergic users.
Spermicidal condoms give better protection.	Added spermicide does not improve STI protection and can irritate tissue.
Latex is purely synthetic.	Latex comes from rubber tree sap, though some condoms still are not vegan because of processing aids.

UK rules and standards

In the UK, condoms should carry a CE or UKCA mark, which shows they have been tested to recognised safety standards. The relevant standard, ISO 4074:2026, sets requirements and test methods for natural rubber latex condoms, including stability testing to estimate shelf life before a design goes on sale. NHS guidance puts condoms at up to 98% effective at preventing pregnancy when used correctly every time, and advises checking the use-by date before use.

Picking the right one

If you want to go deeper, our guides on how to choose a condom, whether condoms are vegan and how effective condoms are cover the practical decisions. And if you would rather have fun with the wrapper, browse our funny condoms or design your own.

Frequently asked questions

Which condom materials protect against STIs?

Latex, polyisoprene and polyurethane all protect against STIs when used correctly. Lambskin does not.

What should latex-allergic users choose?

Polyisoprene or polyurethane, the two main latex-free alternatives.

Is latex plant-derived?

Yes. Natural latex comes from rubber tree sap, but the finished condom may still include animal-derived processing aids.

Are latex condoms vegan?

Sometimes, but not always. It depends on whether casein or other animal-derived ingredients were used in manufacturing, so check the packaging.

Do lambskin condoms prevent STIs?

No. They can help prevent pregnancy, but they do not reliably block STI transmission.

Is oil-based lube safe with condoms?

Not with latex condoms. Oil-based products can weaken the material and cause splitting. Use water- or silicone-based lube.

Do ultra-thin condoms break more often?

Not necessarily, as long as they meet recognised quality standards.

What does a delay condom do?

It usually contains a numbing agent such as benzocaine or lidocaine to help delay ejaculation.

Sources: NHS, “Condoms”; ISO 4074:2026, natural rubber latex male condoms (requirements and test methods); BSI, condom certification; Vegan Society guidance on latex and casein. General health information, not medical advice.