【26-45L EXPANDABLE DESIGN】: Before extended is 26L, dimensions are 19.5x13x6.8inch; after extended is 45L, dimensions are 19.5x13x11.5inch. 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. 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, it is great for 3-7days daily travel.

【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. 19inch laptop compartment size: 16.5" x 11.8" (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.

【Our Service】: If you are not satisfied within one month, you can get an unconditional refund. If you have quality problems within one year, you can contact us. We will respond to your request and after-sales within 24 hours.