Weighs only 5.9lbs. Special built-in, high-density foam structure helps maintain the bag"s shape while minimizing weight. * Main compartment, with book-style opening, has a large mesh pocket and interior clothing hold-down straps. Main compartment expands 2in/5cm for additional storage capacity. * Upper front pocket holds airline tickets or travel necessities. Lower front pocket holds magazines and small travel gear. Custom ID holder is hidden in the upper front pocket. * Materials: Nylon Mini-Diamond Rip stop, Mini-Weave Duralite and Duraweave. Capacity: 3050 Cubic inches / 50 liters (expanded) Weight: 5.9 lbs./ 2.7kg