Tigernu Expandable Business Backpack 17-Inch Laptop Bag WetDry Separation Pockets 1. Patented Floating Zipper Design - Reduced friction technology for extended durability. 2. Vacuum Compression Backpack with Built-in Air Pump - Enhances travel efficiency by expanding storage capacity while reducing bulk. (Vacuum Version Only) 3. Premium Dual Material Options: 300D x 70D nylon foam material (Black)200D waterproof composite material (Blue) - Scratch-resistant, frost-resistant & waterproof, eco-friendly odor-free fabrics. 4. Convertible 2-in-1 Design - Transforms effortlessly between backpack and handbag carrying styles. 5. Smart Expandable 27L-37L Capacity - 180-degree full-access opening with multifunctional compartments: main compartment, dedicated laptop sleeve, wetdry separation bag, front zippered pocket, inner organizational pocket, and anti-theft back pocket. 6. External USB Charging Port - Compatible with personal power banks and charging cables. 7. Ergonomic Travel Features - Reinforced straps, curved shoulder padding, honeycomb ventilation back cushion, luggage handle sleeve, adjustable chest buckle, and quick-access card slots on straps.