GPS lingerie is now available, thanks to Brazilian lingerie maker Lucia Iorio, who markets it to "techno-savvy women."
This collection ... is a wink to women and a challenge to men because, even if she gives him the password to her GPS, she can always turn it off," Iorio told AFP.
"She can be found only if she wants to."
GPS lingerie is expensive enough that you'd want to keep track of it anyway; it starts at $US800.
(GPS lingerie video)
The earliest reference I know for built-in electronics in clothing is the sleeve communicator from Murray Leinster's classic (and retro-Hugoed, if I'm not mistaken) 1945 story First Contact.
He pressed the button in his sleeve communicator and snapped:
"Action stations! Man all weapons! Condition of extreme alert in all departments immediately!"
(Read more about Leinster's sleeve communicator)
I should also point out that one of the main features of a GPS, the ability to automatically graph a journey on a map, was described by Jack Williamson in his 1936 story The Cometeers; see the entry for cartograph.
More references to clothing with built-in electronics: