Men's Backpack, Rucksack, Square Backpack, Waterproof 17-inch PC Business Laptop Bag with USB Charging Port, 30L Outdoor Travel Disaster Prevention Commuting Shoe/Lunch Box Storage [30L Large Capacity | Expandable] Size: (45+13)cm*33cm*18cm Weight: Approx. 1KG Capacity: Approx. 30L Popular BOX structure/square type + wide gusset, excellent storage capacity, a rucksack that is very active in any scene. It can hold a 17-inch PC, A4 size documents, and enough items for 2-3 days of clothes, and is a large-capacity backpack with smart sorting pockets. There may be small errors due to manual measurement.