People commonly worry about condoms breaking as a cause of unintended pregnancy. To better prevent this from occuring, condom manufacturers advise that condoms be kept in a cool, dry place since storing them in heat (such as a glove compartment or wallet) can cause them to become brittle and tear .
1. Trojan Brand Condoms. Health Info Centre Directory [homepage on the internet] Church and Dwight Co; [Cited 2007 April 26]. Available from: http://www.trojancondoms.com/default.aspx?jumpFrame=health_center