Business backpack, expandable, fits 15.6-inch PCs, rain-resistant, waterproof KK zipper, lightweight, BS Expandable PC Backpack

Dimensions: 46cm high x 30cm wide x 17cm deep (22cm expanded). The gusset expands approximately 5cm when the zipper is opened and closed. Capacity: 23L (30L expanded). Weight: 800g. A dedicated pocket for a 15.6-inch laptop is included. Features a YKK Aquaguard waterproof zipper, preventing rain from seeping in and protecting your laptop. The interior is lined with 5mm thick urethane cushioning and brushed fabric for added protection against shocks and bumps. The fabric is made of 420 denier polyester PU with a water-repellent finish for rain and dirt resistance. The bottom is made of 1000 denier nylon fabric with a water-repellent finish for abrasion and tear resistance. A 10mm thick sponge insert ensures the bag stands upright. The back is made of air mesh fabric for excellent breathability and cushioning. The shoulder harness is 60mm wide and 15mm thick, reducing the weight of your luggage and laptop. It also features a carry bar pass-through for placing the bag on top of a suitcase.