A. Features 1. Large capacity and easy to store: Portable travel backpack with multiple compartments, organization and expansion. The main pocket can hold travel goods, can hold 5 - 8 pieces of clothes. The front compartment can also store magazines, books and a power bank that can charge your phone. The laptop pocket can accommodate laptops up to 15.6 inches, the backpack's back with padded dough can protect your laptop. 2. Expandable design: You can expand the zipper and buckles (expandable 12 cm) according to your needs. Two handles on the top and side for easy switching from backpack to suitcase. So it can be carried vertically or horizontally. The luggage strap on the back allows you to slide through the luggage tube, the backpack is easy to carry, suitable for 3 - 5 days daily travel. 3. Waterproof Design: The business backpack is made of waterproof and durable nylon fabric. There is a hidden anti - theft pocket on the back to protect your valuables from thieves. Inner waterproof PVC material to protect your goods from water. 4. Ergonomic airflow back design with thick but soft multi - panel ventilated padding, providing extra support and comfort, reducing pressure on your shoulders and neck. Shoulder straps with adjustable non - slip chest strap and quick release. 5. A companion for commuting, business trips, hiking, traveling, camping and other outdoor activities. B. Specification Material: Oxford cloth Color: Black Size: Small: 47 x 31 x 25 cm(35L), Large: 52 x 34 x 27 cm(45L) Weight: 1550g, 1610g C. Package includes: 1x backpack