Capacity34 LTDimensions51 x 39 x 27 cmFunctionalsDouble telescopic bar with Crossover System to “save” the shoulder straps. 3 possible uses: 1) Backpack without the trolley cart; 2) Backpack with wheels; 3) Hand Luggage. 3 wheels for stairs climbing.Other features Removable carabiner. Warranty2 YEARSBackPadded and lined with outer fabric.ShoulderPadded and lined with outer fabric. CROSS-OVER SYSTEM: The shoulder straps are automatically lifted-up when it is used as wheeled backpack.PocketsFront pocket.FabricPolyester fabric.