This is the DuoFlip: a clever accessory that holds your IDs on the back of your phone. You can access your cards with a simple flip. This MagSafe card holder doubles as a horizontal / vertical iPhone stand . It can be easily used with a lanyard. It is available in 3 cool colors.
The DuoFlip has 2 card slots (one with a window and the other covered). You can tap without having to remove any of your cards.[where to get it]