BANGE mens carry on backpack can be expanded from 26L to 45L, and it is perfect for your business travelling, it can hold 7--9clothes in the main compartment, compatible for 17.3inch laptop,9.7inch Ipad. There is one dry and wet separation pocket, and you can separate your wet washing items from others.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. In the main pocket, there are dual durable zipper, can it allows you to open the backpack to 180 degree, it is very easy to put and take your items. BANGE travel backpack is approved by FAA flight, and it is very suitable for your business travelling. Waterproof PVC material, internal waterproof pouch to protect your goods from water. Ergonomic airflow back design with thick but soft multi-panel ventilated padding for added support and comfort, decreasing the pressure of shoulder and neck.Shoulder straps with adjustable anti-slip chest belt and quick release. A great companion for overnight, commuting, business trip, hiking, travel, camping and other outdoor activities.This item is not intended for use by childer 12 and under .