I used this as a work bag for about a year. It's large enough to fit A4 documents, and it seems like it could even fit A3. It has a good amount of depth, and the main compartment and two side pockets are spacious, allowing you to carry a lot of items. The exterior is leather, the lining is nylon, and the inside is also nylon, making it easy to handle. I can't identify the brand because there's no tag. There are no noticeable scratches, but there are some wrinkles and some areas where the color has faded slightly (see photo 8). Color: Gray系 (Gray-ish) Material: Faux leather Tote bag, shoulder bag, work bag, work briefcase For those who carry a lot of items, all-purpose bag, mother's bag