The skinniest wallet you will find. Made of water resistant nylon micro-fiber. This wallet has 4 card slots, one clear vinyl ID slot, a full length slot for bills and two hidden slots for extra cards, personal items, or a photo of your cat. Note that each slot can fit several cards. Measures 3 1/4 X 4 1/4 inches. Available in four colors: black, brown, grey, and navy.