Non-latex condoms are barrier contraceptives made from materials other than natural rubber latex. They exist primarily for the 1 to 2 percent of the general population with a latex allergy, but many people without allergies choose them for comfort or sensitivity reasons. The three main types are polyurethane, polyisoprene, and lambskin, and each has meaningfully different properties when it comes to protection, feel, and what lubricants you can pair with them.
The Three Main Materials
Polyurethane condoms are made from a thin plastic. They conduct body heat better than latex, which many users say makes sex feel more natural. They can also be made thinner than latex condoms while maintaining strength. A major practical advantage: polyurethane is compatible with oil-based lubricants, which would weaken and break a latex condom.
Polyisoprene is a synthetic version of the rubber compound found in latex, but without the proteins that trigger allergic reactions. These condoms stretch and fit much like traditional latex, so they feel familiar. The tradeoff is that polyisoprene shares latex’s vulnerability to oils. According to Planned Parenthood, oil-based lubricants like petroleum jelly, mineral oil, and vegetable oils damage both latex and polyisoprene condoms. Stick to water-based or silicone-based lubricants with these.
Lambskin (or natural membrane) condoms are made from the intestinal lining of sheep. They have a reputation for providing the most natural sensation of any condom type, and they’re also compatible with oil-based lubricants. However, they come with a serious limitation covered below.
STI Protection Varies by Material
This is the single most important distinction between non-latex condom types. Polyurethane and polyisoprene condoms block both sperm and sexually transmitted infections, including viruses like HIV and HPV. Lambskin condoms do not reliably prevent STI transmission.
The reason is structural. Lambskin membranes contain natural pores that can measure up to 1,500 nanometers in diameter. That’s small enough to block sperm cells, which are vastly larger, but big enough to allow viruses and bacteria to pass through. If pregnancy prevention is your only concern, lambskin works. If you need STI protection, it does not.
How Effective Are They at Preventing Pregnancy?
Non-latex condoms are effective contraceptives, though the data suggests they carry slightly higher failure rates than standard latex. A randomized controlled trial published in Perspectives on Sexual and Reproductive Health found that over six cycles of use, the typical-use pregnancy rate for a non-latex condom was 10.8 percent, compared to 6.4 percent for latex. With perfect use every time, the gap narrowed but remained: 5.1 percent for the non-latex condom versus 0.7 percent for latex.
Polyurethane condoms performed better in a separate trial, with a consistent-use pregnancy rate of 2.4 percent over six cycles. These numbers place non-latex options in the same general effectiveness range as latex, but the difference is real enough to be worth knowing, especially if condoms are your sole method of birth control.
Lubricant Compatibility at a Glance
- Polyurethane: Compatible with water-based, silicone-based, and oil-based lubricants.
- Polyisoprene: Compatible with water-based and silicone-based lubricants only. Oil degrades the material.
- Lambskin: Compatible with water-based, silicone-based, and oil-based lubricants.
This matters more than it might seem. Many common household products people reach for in the moment, like coconut oil, lotion, or petroleum jelly, are oil-based. Using them with a polyisoprene condom can cause it to weaken and break during use.
Choosing the Right Type
Your choice depends on what you need the condom to do. If you have a latex allergy and need full STI protection, polyurethane and polyisoprene are your options. Polyurethane gives you more lubricant flexibility and tends to feel thinner. Polyisoprene stretches more like latex, so it may fit more securely if you’ve found that plastic-style condoms slip.
If you’re in a mutually monogamous relationship, have been tested for STIs, and want the least noticeable barrier possible, lambskin offers the closest sensation to no condom at all. Just remember it provides zero reliable virus protection.
Non-latex condoms are widely available at pharmacies and online, though they typically cost more per unit than standard latex. Polyisoprene options like SKYN have become especially common and are stocked alongside latex brands at most retailers. Polyurethane and lambskin condoms may require a bit more searching depending on your area.