Size: 31x16x55cm. Backpack size 43cm. Three large outer compartments. Closes with zips and heavy duty rope pullers. Lined inside. In addition it has two high quality reinforced side pockets for bottles and accessories. Adjustable, padded and ergonomic shoulder straps for a better fit to the back. Padded back padding for greater comfort, with a top handle that adds extra comfort to its handling. Adaptable to trolley. High quality 100% polyester cross-braided material.