1.High Quality Stainless Steel made: Smooth surface and stable construction to protect cards well | 2.Humanized design : Soft edges of the metal case which helps to avoid any damage of pockets, bags or briefcases | 3.Portable and light weight: Weight is 67g, the wallet case type is more convenient to store or take outside when traveling | 4.Curved Sponge inside: Keep the cards organized and also easy to put in as well as take cards out without any crack or bend , protect cards better than normal cases | 5.Small size with big capacity: 3.74*2.64*0.5(inches), 8 Nintendo switch cards slots and 2 micro SD cards slots.