Belt wallets are pouches with flaps designed to hold credit/debit cards and cash. They can be made in any thickness. They normally come with a spring steel clip on the back but can be made with a belt loop as well. It keeps you from sitting on your wallet and throwing your back out. They can also be lined with an RFID blocker since all the cards seem to be "chipped" now. With the belt clip, a spare car or house key and be put between the clip and the pouch, so you always have a spare key with you. This is the type of wallet I personally use. Like everything I make, it has a lifetime warranty.