U style zipper deign, it is more convenient to store things.Handle design in the top, it is convenient to carry.Water bottle bag design, it can adjust and fasten by the retractile rope.With magic tapes to fasten at the bottom, it is easy to adjust and install.It is suitable for bicycle.Specifications:Color: BlackMaterial: 600D PolyesterProduct weight: 365gPackage weight: 393gProduct size: 28 * 16 * 14cmPackage size: 44.5 * 23.8 * 7.5cmPackage list:1 * Bicycle rear trunk bag