This is a large SOLO-TOURIST Boston bag. The back cover opens to become a backpack. It's a 3-way bag, functioning as a backpack, a Boston bag, and a handheld bag, and also includes a detachable small backpack. Material: Cordura nylon Color: Dark green I used it once for an overseas trip, and it has been stored in a closet since then. It can hold luggage for about 3 nights and 4 days. There are no noticeable stains, and it's a product that can still be used for travel. #solotourist #backpacker