PORTER 3-way bag. It's very convenient, as you can use it as a backpack, shoulder bag, or tote bag depending on the situation. Made of durable nylon fabric, it's a material that's resistant to scratches. I commute by car, and I use a different bag at work, so I basically kept this bag in the car during the day. Therefore, there are some minor scratches and dirt from use, but nothing noticeable. It has many pockets and was very easy to use. I think it can be used for both business and casual occasions. I vacuumed the pockets as much as possible to remove dust, etc. I have never used the shoulder strap. #YoshidaKaban #PORTER #PorterBag #Porter3WayBag Color...Black系 (Black-based) Accessories...Shoulder strap