Waterproof Backpack Bag with USB Charging Port Material Type: Oxford Weight: 0.8kg Laptop Size: 15.6 Inch Compartments: 3 Capacity: 20-39L Style: Fashion, Stylish Interior: Computer Layer Use: Travel, Sports, Home Book, Business Closure Type: Zipper Carrying System: Airbag Belt Dimension Information: 14~22*30*43cm Handle/Strap Type: Handel Hard Feature: Multi-functional, High Quality Anti-Theft Pocket Waterproof 100% Eco-Friendly Easy USB charging Stylish appearance Multiple compartments Capacity 30L inside Contains multiple pockets for easy organization RFID Expandable