The name, which the London Rubber Company trademarked in 1929, is a portmanteau of "Durability, Reliability, and Excellence", though some people mistake it as being "Durable Latex".
Durex condoms represent around one quarter of the global market for prophylactic sheathes, manufacturing around one billion units per year in 17 factories worldwide. Durex condoms are the most popular brand of condoms in the UK. The Durex range includes nine varieties of latex condom, including the Sheik and Ramses brands popular for decades in North America, and the Avanti condom, the first male condom made from polyurethane. Polyurethane condoms don't suffer from the "latex rot," and are suited for users who have an allergic reaction to latex.
In August 2007, Durex announced that it expected to launch a new line of condoms that will help men get a firmer erection and increase penis size. The condoms will contain a gel in the tip that dilates arteries and increases blood flow to the penis.