Waterproof USB charging Backpack Material Type: Microfiber Weight: 1.05KG Laptop Size: 15.6\" Inch compartments: 4 Capacity:20 Litre,39 Litre Style: Fashion Usage: School, Business,Travel Carrying System:Physiological Curve Back Interior:Interior Compartment Dimension information:290*160*450mm Feature: Multi-functional, High Quality USB Anti-Theft Waterproof Lightweight Stylish look 20L Capacity