This is a large SOLO-TOURIST Boston bag. When you open the cover on the back, it turns into a backpack. In addition to being a 3-way bag (backpack, Boston bag, and handbag), it also comes with a removable small backpack. Size: 70cm (height) x 45cm (width) x 20cm (depth) (measured by a layman) Size can be slightly adjusted with compression straps. Material: Cordura nylon Color: Dark green I used it once for a trip, and it has been stored in the 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