The safest condom is not a particular brand. Every condom legally sold in the UK has to pass the same independent safety standard, ISO 4074 for latex and ISO 23409 for non-latex, and carry a CE, UKCA or BSI Kitemark to prove it. What separates a condom that protects from one that fails is fit, correct use and the right lubricant, not the name on the box. Used perfectly, condoms are around 98% effective against pregnancy. In typical use that falls to roughly 85%, and almost all of that gap is user error rather than product failure.
This guide covers what the safety marks actually mean, what the testing involves, whether extra safe condoms are genuinely safer, and how to make sure the one you buy fits.
What You'll Find in This Article
- What condoms are the safest?
- What the CE mark and BSI Kitemark mean
- What ISO 4074 testing involves
- Is there a safest condom brand?
- Are extra safe condoms actually safer?
- Why fit matters more than brand
- Latex, polyisoprene and polyurethane compared
- Which condom is safest for anal sex?
- How to use a condom correctly
- Non-spermicidal options
- What to look for on the packet
- Frequently asked questions
What Condoms Are the Safest?
Any condom carrying a CE mark, UKCA mark or BSI Kitemark. Those marks are not marketing, they are the evidence that the product has been independently tested against an international standard, and a condom cannot legally be sold in the UK without one.
Latex and polyisoprene are the two materials that perform best in general use, because they are elastic enough to be forgiving of small differences in fit. Polyurethane is also effective and is the option if you react to both of the others. Lambskin condoms do not protect against STIs at all, which is why we do not sell them.
Beyond that, the ranking people are looking for does not really exist. All the condoms we stock meet the same standard. The variable that changes your actual risk is whether the condom fits and whether it is used properly.
What the CE Mark and BSI Kitemark Mean
Any condom legally sold in the UK carries a CE or UKCA mark. That confirms the product has been assessed for safety, biocompatibility and manufacturing quality, with clinical data reviewed and in-process testing during production.
The BSI Kitemark goes further. To earn and keep it, a manufacturer has batches independently tested by the British Standards Institution on an ongoing basis. The CE or UKCA mark says the product met the standard at certification. The Kitemark says it is still being tested, batch after batch.
Reputable brands carry both, including Durex, SKYN, Pasante, EXS and MY.SIZE. If you cannot find either mark on a packet, particularly on cheap products from an unverified seller, do not use it.
What ISO 4074 Testing Involves
ISO 4074, the standard covering latex condoms, sets out a demanding battery of tests.
Electronic hole detection. Every individual condom is passed over electrodes in an electrolyte solution. Any hole creates a circuit and the condom is rejected. This is not a sample test, it applies to every unit made.
Burst pressure and volume. Samples from each batch are inflated until they burst. The standard requires a minimum burst volume of 18 litres. In practice most quality condoms hold considerably more than that, which gives a sense of how much margin is built in.
Tensile strength and elongation. A strip of the material is stretched until it breaks, measuring how elastic and resilient it is.
Package integrity. The foil is tested for seal strength and leaks, so the condom stays sterile on the shelf.
The reason this matters: material failure in normal use is rare, and when a condom does fail it is almost always down to how it was used or stored rather than how it was made.
Is There a Safest Condom Brand?
No, and the question is worth retiring. Every brand we sell meets the same standard, and none of them is permitted on the market otherwise.
Durex is the most recognised name in the UK and it is a good brand, but it is not safer than SKYN, Pasante, EXS, Mates, Skins, Glyde or Vitalis when used as intended. Recognition comes down to marketing and history rather than any measurable safety difference.
A more useful question is which condom suits what you need it for. Flavoured for oral, extra safe for anal, non-latex for allergies, and the right nominal width in every case.
Are Extra Safe Condoms Actually Safer?
Slightly, and only in specific circumstances.
Extra safe condoms are thicker than standard, typically around 0.08mm against 0.06mm to 0.07mm. That extra material gives a small additional margin against breakage.
For vaginal sex with adequate lubrication and a condom that fits, a standard condom is already comfortably within its safety tolerances, so the practical difference is marginal. The trade-off is reduced sensation.
They earn their place if you are having anal sex, if standard condoms have slipped or felt fragile for you before, or simply if the reassurance means you use them more consistently. That last reason is not trivial, because a condom you actually use beats a thinner one you do not.
What extra safe condoms do not do is compensate for the wrong size. A thicker condom in the wrong width still fails.
Why Fit Matters More Than Brand
A condom in the wrong size is a less safe condom, whatever standard it has passed. Too tight and it is overstretched, more likely to split and more likely to roll down. Too loose and it can slip off, bunch, or leave gaps at the base.
Condoms are sold by nominal width, the flat width of the condom laid out, which is roughly half the circumference of the penis. Standard runs from about 52mm to 56mm, and the wider market covers roughly 45mm to 69mm.
If condoms have always felt uncomfortable, tight, or prone to slipping, the problem is almost certainly width rather than brand or material. Our condom size guide explains how to measure and which widths correspond to which brands.
Latex, Polyisoprene and Polyurethane Compared
All three protect effectively against pregnancy and STIs when used correctly.
Latex. The most common material, strong, elastic and thoroughly tested. Unsuitable if you have a latex allergy, and degraded by oil-based lubricants. Browse latex condoms.
Polyisoprene. A synthetic rubber that behaves much like latex without the natural proteins that trigger latex allergies. Same effectiveness, same sensitivity to oil-based lubricant. SKYN is the best-known polyisoprene range in the UK.
Polyurethane. Thinner and less elastic than the other two, and it conducts heat differently, which many people prefer. It is not degraded by oil-based lubricants. Being less elastic, it is slightly less forgiving of a poor fit.
For most people latex or polyisoprene are the more practical choices because their elasticity absorbs small fit differences. Polyurethane is the answer if you react to both. Our non-latex range covers the alternatives.
Which Condom Is Safest for Anal Sex?
Anal sex involves more friction and less natural lubrication, so the two things that matter are a well-fitting condom and plenty of the right lubricant.
Extra safe or thicker condoms are the usual recommendation, and several brands make condoms specifically for it. Use a generous amount of water-based or silicone-based lubricant, and reapply rather than pushing on without it, since friction is what causes most breakages here.
Never move from anal to vaginal sex on the same condom. Change to a fresh one. Our guide to safer anal sex covers this in more detail.
How to Use a Condom Correctly
Perfect use and typical use produce very different numbers, around 98% against roughly 85%. The gap is made up of these mistakes.
The wrong lubricant. Oil-based products, baby oil, coconut oil, petroleum jelly, body lotion, degrade latex and polyisoprene within minutes. Use water-based or silicone-based lubricant only.
No space at the tip. Pinch the tip to expel air before rolling it on. Trapped air makes a burst more likely.
Rolling it on inside out. If you start unrolling and realise it is the wrong way round, discard it and use a new one rather than flipping it over.
Putting it on late or taking it off early. It goes on before any genital contact, not just before ejaculation, because pre-ejaculate carries both pregnancy and STI risk.
Using two at once. Double-stacking creates friction between the two condoms and makes both more likely to break. One, used properly, is safer.
Expired or damaged. Check the date and the foil. A brittle, sticky or crinkled condom has degraded and should go in the bin.
For the full method see our guide to putting on a condom, and for storage see how long condoms last.
Non-Spermicidal Options
Some condoms are lubricated with a spermicide called Nonoxynol-9. It adds a small amount of protection against pregnancy, but it irritates some people, particularly with frequent use, and irritation can itself raise STI risk by disrupting the vaginal environment.
If you get redness or discomfort after using standard condoms, switching is worth trying. Our guide to non-spermicidal condoms lists which products contain none, and there is a separate guide on whether Durex condoms contain spermicide.
What to Look for on the Packet
- A CE, UKCA or BSI Kitemark, confirming independent assessment
- Nominal width in millimetres, which tells you the size
- The expiry date
- The material, latex, polyisoprene or polyurethane
- The lubricant type, water-based, silicone-based or spermicidal
- An intact foil that feels slightly inflated, which shows the seal has held
Frequently Asked Questions
What are the safest condoms?
Any condom carrying a CE, UKCA or BSI Kitemark, because those marks confirm it has passed independent testing against ISO 4074 for latex or ISO 23409 for non-latex. Latex and polyisoprene perform best in general use because they are the most elastic. What actually changes your risk is getting the width right and using it correctly, not the brand.
What is the safest condom brand?
There is no safest brand. Every condom sold legally in the UK meets the same standard, and one that did not could not be sold. Durex, SKYN, Pasante, EXS, Mates, Skins and Glyde are all equally safe when used as intended. Choose on fit, material and what you need it for rather than on the name.
Are Durex condoms safe?
Yes. Durex condoms are CE marked, electronically tested and meet ISO 4074, the same standard every condom sold in the UK has to meet. Durex is the most recognised brand in the country, which is a matter of marketing history rather than a safety difference. Browse our Durex range.
How safe are Durex Extra Safe condoms?
They are thicker than a standard Durex condom, around 0.08mm, which gives a small extra margin against breakage. They meet exactly the same testing standard as every other condom, so the difference is thickness rather than certification. Most useful for anal sex or if standard condoms have felt fragile to you before.
Are extra safe condoms actually safer?
Marginally, and mainly in specific situations. The extra thickness gives a small additional margin against breakage, which matters most for anal sex or if standard condoms have slipped for you. For vaginal sex with enough lubrication and the correct width, a standard condom is already well within tolerance. They will not fix a condom that is the wrong size.
How effective are condoms?
Used perfectly, condoms are around 98% effective at preventing pregnancy. In typical use that drops to roughly 85%. The difference is almost entirely user error: wrong size, oil-based lubricant, putting it on too late, or using an expired one. They also substantially reduce STI transmission, though protection is partial for infections spread by skin contact.
Are non-latex condoms as safe as latex?
Yes. Non-latex condoms sold in the UK meet ISO 23409 and carry the same safety marks as latex ones. Polyisoprene and polyurethane are both proven barriers against STIs and pregnancy. Polyurethane is slightly less elastic, so getting the width right matters a little more. See our non-latex range.
Does condom size affect how safe it is?
Considerably. A condom that is too tight is overstretched and more likely to split, and one that is too loose can slip off or leave gaps at the base. Condoms are sold by nominal width, roughly half the circumference of the penis. If condoms have always felt wrong, width is the likeliest reason, and our size guide will sort it.
Which condom is safest for anal sex?
A thicker or extra safe condom in the correct width, used with a generous amount of water-based or silicone-based lubricant. Anal sex creates more friction and there is no natural lubrication, which is what causes most breakages. Reapply lubricant rather than continuing without, and always change to a fresh condom before moving to vaginal sex.
Medical disclaimer: This article is for informational purposes only and does not constitute medical advice. For personal guidance on contraception or sexual health, speak to a healthcare professional or visit NHS.uk.
