Material: Crafted from high-density, water-resistant, and scratchproof coated Oxford fabric.Laptop Compatibility: Equipped with a separate padded compartment that securely shields laptops up to 15.6 inches.Smart Connectivity: Features an integrated external USB charging port (requires a power bank inside) to charge devices on the go.Storage & Ergonomics: Includes a 21-liter expandable capacity, reasonable layered multi-compartments, an air-permeable breathable back panel, and convenient shoulder strap card slots.