Durex Condoms knows their way inside and outside of the bedroom. In fact, they have over 80 years of experience. International standards demand that a condom can contain 18 liters of air in an “air burst test.” A Durex condom will typically expand to hold 40 liters of air without bursting. Sample condoms are also filled with water to make sure they don’t leak. All condom types are also dermatological & electronically tested. As a result, millions of people across the world use Durex Condoms every day.