Tigernu T-B9121 15.6 Inch Men Expandable Waterproof Lightweight Laptop Backpack With Floating Zipper

1. Expandable compartment, can be expanded as needed, easily switching between business and travel modes.2. Patented floating zipper design, reduces thread wear compared to ordinary zippers, extending lifespan.3. Lightweight design, weighs only 0.88kg/1.11kg, effortless and casual to carry.4. Water-repellent hydrophobic bottom fabric, resistant to deformation and wrinkles, easy to maintain.5. Back panel with integrated luggage strap, freeing your hands instantly for a pleasant travel experience.6. Capacity: 15.6-inch 10L (expandable to 18L), 17-inch 18L (expandable to 30L).7. Material: Highly elastic hydrophobic bottom fabric.8. Lining: 210D jacquard lining fabric in black.