From the official website: I have never used this item after purchasing it, so it is unused. I opened the packaging and threw away the original packaging materials. This item is made with high-quality navy blue cowhide leather and red stitching, resulting in a simple and elegant design. The pocket on the back of the card case can hold business cards or a commuter pass. The design, featuring the Keio color (BRB) and a pen mark, will brighten up your daily commute to work or school. How about pairing it with the BRB neck strap?