The design seems to go back to the origin of the wallet: "Wrap paper money carefully in leather." I use it to put a bookmark in a book. Both sides, which are sewn all the way up in a regular folded wallet, have been made open for use as a spread. An unconventional shape for a wallet, free from the action of inserting and pushing a finger into a narrow wallet. It gives you a sense of "Oh, it's so easy."