It Says It Right Here on the Package: Make with the Naked. Inflate Condom. Let the Sweet, Sweet Love Flow

A melon-colored model distributed by Planned Parenthood performed the worst, bursting during a test in which the latex condoms were filled with air.

In Planned Parenthood's defense, let me point out that if you're in a situation calling for condom use and you begin filling yours with air, you won't have to worry about the effectiveness of the device. Your chances of coitus will be over. Trust me, the voice of experience (sadly, little of it sexual).