A condom covers the erect penis during sex and stops sperm from entering the woman's vagina. Most male condoms are made from thin rubber (latex). About 2 in 100 people are allergic to latex. The newer plastic (polyurethane) condom is an alternative. Polyurethane condoms are also odour-free, thinner and more sensitive than latex condoms. However, they are more expensive.
This is a companion discussion topic for the original article at https://patient.info/sexual-health/contraception-barrier-methods/condom-sheath