This Versatile Expandable Backpack is constructed from nylon and can easily hold a 17 inch laptop. It features an expansion design and a high capacity of 39L. The bag also includes a wet and dry separation bag and a USB charging interface. The material is waterproof and the back cushion is made of breathable sponge. With a multi-compartment design, this bag can hold all your essentials. It also has an independent laptop bag, can be inserted into luggage, and includes a back anti-theft bag and shoulder strap glasses buckle. The dimensions are 46 * 30 * 18 (expands to 28CM).
