Tigernu Expandable Business Backpack 17-Inch Laptop Bag Wet/Dry Separation Pockets Black

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, wet/dry 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.