Xpander the flight approved travel backpack. This water resistant durable large daypack business weekender back pack is heavy duty and suitable to carry 17-inch Laptop. You can expand the zipper and buckles according to your requirement. The two handles set on top and one side, which allow an easy switch between backpack and suitcase. So it can be carried vertically or horizontally. The luggage belt on the back allows being slide over the luggage tube, backpack very easy to carry. The backpack with many compartments, organization and expansion (2 inches). The front pocket can hold your travel goods, magazines, iPad and books. The main pocket has 17 inch laptop compartment with padded batter can protect your laptop and comes with power bank attachment that is useful to charge your phone while on move. The compartment can hold set of clothes for your quick travel. Ergonomic airflow back design with thick but soft multi-panel ventilated padding for added support and comfort, decreasing the pressure of shoulder and neck. The shoulder and handle joints are adopted bold line sewing to make it sturdier. The two thick handles are comfortable for long time carrying. All the zippers are durable and smooth which are sturdy. Different compartments with different sizes and features make you to storage items easily and neatly. A great companion for school, commuting, business trip, hiking, travel, camping and other outdoor activities. Size: 19x15x7 inches (before expanded) Expansion gives an extra space of 2 inches.