The Mondego FB 4 is a small but useful member of your cycling expedition. It is extremely lightweight, but strong and reliable. You can use this bag not only for a spare inner tube or montpak, but you can also put a few energy bars or travel soap in it. Everything fits nicely, either in the main compartment or the outer pocket, both of which are zippered. It attaches to the frame tube very easily, with four velcro straps. It adapts beautifully to any diameter tube, whether you have a gravela or a torch. Equip yourself with other bags from the Mondego family and enjoy your expeditions to the max. Reflective details. Zippered main compartment. Zipped side pocket. Main fabric is 100% recycled and bluesign® certified.