1. Modular design assemble 3 modules at your will
2. The fundamental (card module): can hold 3 cards and some cash
3. The subsidiary (bill module): with elastic band can hold 6 cards and more cash
4. The pouch (coin / key module): bottom opening no need for zipper
5. Each module can be separately
6. Magnetic connection design easy to assemble and separate
7. Slim and portable easy to carry