What quality tests do Durex condoms go through?

Every Durex condom is electronically tested to ensure it's up to the job. A random sample of condoms is also taken from each batch for more rigorous quality tests. After measuring thickness and length, samples go through the air inflation test to check for burst strength and elasticity (typically a Durex condom can hold 40 liters of air without bursting). Water leak testing is also carried out. Sample condoms are filled with water - suspended for one minute and rolled on blotting paper which shows up any leakage. Approximately two million water tests are carried out every month in Durex factories. If the sample fails any of the tests, the whole batch is rejected!