The Mobius is made from a single piece of full-grain leather. It features a unique tuck closure and 2 pockets fitting up to 10 credit cards and quite a bit of cash. We have fit as many as 25 bills and 10 credit cards in the wallet at one time. The main benefit of the Mobius is the ability to store cash without folding it first. Simply slide it in the back and tuck it in the front along with the flap.