French Dupui box calfskin leather is used and improves with age. Calfskin leather is used by leading European brands and has a tradition and style. Easy to use bi-fold This type does not have a simple coin purse and is stylish without being bulky. There are 2 bill compartments for convenient sorting. There is a hidden card slot so you can put 11 cards! This product is sewn with a repeat stitching. The edges of both the front and inner leather are stitched with a reverse and a very gentle touch on the top part. In addition, the inner leather uses cool navy for increased sensitivity.