Osnodd - Stop the thief!
Elastic string with a strong clip in each end. One is attached in the wallet, the other one in your bag or jacket. The elastic string pulls back the wallet if someone tries to steal it. To loose the wallet from the string the thief has to get both hands in your pocket. One hand to take the wallet, and the other one to open the clip. The string can also be used to attach suitcase to your clothes on for exampel an airport where bagtheft is usual.