Koyono’s Slimmy wallets are among the absolute thinnest on the planet, and come in three great versions – the Slimmy, the ViewSlimmy, and the SlimSlimmy. They feature an open, three-pocket design that holds the essentials – cash, credit cards, driver’s license, and receipts. Our favorite of the bunch is the Slimmy ($30; black, brown or tan). It’s simply the perfect front-pocket wallet we’ve tested. The ViewSlimmy ($30; black or tan) is identical to the original, but adds a window for displaying an ID. And for you ultra-minimalists who feel the need to go even slimmer, Koyono offers the SlimSlimmy ($32; black or brown). Barely larger than a credit card, the SlimSlimmy does away with every last bit of excess bulk that a traditional wallet has. Take your pick – you can’t go wrong with any of these.