By Daily Mail Reporter
Controversial: Critics have said underwear featuring a tracking system is the high-tech equivalent of a chastity belt
'It is outrageous to think that men can buy this, programme it and give it to their partners and then monitor them,' said Claudia Burghart, leader of a Berlin feminist group.
'It is nothing more than a chastity belt for insecure men.'
The lingerie combination set consists of lace bodice, bikini bottom and faux pearl collar, with the GPS device nestled in the see-through part of the bodice next to the waist.
'It's not a modern chastity belt. Some men think they can keep tabs on their girlfriends with it, but they're wrong,' she added.
The GPS lingerie sells from a cool £500, complete with a standard Global Positioning System, to £700 with a more advanced model.