The ultra-thin, multi-pocket Big Skinny Zipfold bi-fold wallet keeps all your cash, cards and receipts secure with a full-perimeter zipper. The billfold area has a handy divider and it can carry 20 to 25 full-size plastic cards. It features four card pockets, two extra-large hidden pockets and an ID pocket with a clear plastic window for easy access to your driver's license or work badge. The extra-wide pockets are lined with a rubbery coating to prevent cards from slipping out. Designed with rounded corners for comfort, it's constructed of a lightweight, water resistant nylon microfiber material that is 5 to 7 times thinner and lighter than leather. It's machine washable for easy care and it dries out in about 20 minutes. The Zipfold wallet measures 4-7/8 x 3-7/8 Inch (and 7 mm thin when empty). The first Big Skinny wallet was designed by Kiril Stefan Alexandrov (the company's founder) because he loathed sitting on a thick, heavy leather wallet. Since creating the original Sport Wallet in 2005 using an advanced nylon micro-fiber material (5 to 7 times thinner than leather), Big Skinny has added dozens of slim wallet styles for men and women with more on the way.