Slim Bifold Wallet Leather Wallet Custom Men Billfold Etsy Slim Bifold Wallet Brandability Slim Sleeve Leather Bi Fold Wallet for Minimalists Bellroy Handmade Leather Bifold Wallet for Men Slim Design Front Etsy Men's Leather Slim Bifold Wallet Etsy. The leather Wallet by Prada is a bifold model with an interior bill compartment and card slots for optimal functionality. The iconic enameled triangular plaque stands out on the front, while the brand's monogram is elegantly engraved on the inside. The leather interior lends a touch of luxury and quality to the design.