BANGE Travel Backpack,Flight Approved Carry On Backpack, Water Resistant Durable 17-inch Laptop Backpacks,Large Business W nder Luggage Backpack for Men women (blackM)

【22-35L EXPANDABLE DESIGN】: Before extended is 22L, dimensions are 17.5x11.8x5.5inch; after extended is 35L, dimensions are 17.5x11.8x9.5inch. 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. LARGE CAPACITY EASY TO CARRY-ON】:The backpack with many compartments, organization and expansion.The main pocket can hold your travel goods,fit 5-8pcs clothes. It is cool that there is a wet pouch to liquids.Front compartment can also hold magazines,Ipad and power bank which can charge your phone. 17inch laptop compartment size: 15.3" x 11.4" (please cheak your laptop size),Backpack Back with padded batter can protect your laptop. 【WATERPROOF & ANTI-THEFT DESIGN】: 1. Backpack back zipper pocket protects your precious articles, such as phone, passport, wallet from potential theft when traveling or lining up; 2 Waterproof PVC material, internal waterproof pouch to protect your goods from water.3.Ergonomic airflow back design with thick but soft multi-panel ventilated padding for added support and comfort, decreasing the pressure of shoulder and neck; 4.Shoulder straps with adjustable anti-slip chest belt and quick release 【DURABLE & MULTIPURPOSE】: 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 explosion-proof. Different compartments with different sizes and features make you to storage items easily and neatly. A great companion for commuting, business trip, hiking, travel, camping and other outdoor activities.