How the Locking Zipper Works: Pull both zipper heads together until they meet. They lock in place and cannot be separated. To unlock, simply slide the zipper heads toward the side with the pull tab until they reach the base, where a clear unlock icon appears, and they release. This expandable anti-theft backpack features a locking zipper system – pull both zipper heads together to lock; slide to the unlock icon to release. 180° clamshell opening for easy packing. Separate padded compartment fits 17.3" laptops. Waterproof fabric, expandable capacity, and a luggage strap for travel. 3-in-1 design for business, fitness, and short trips. Category Details Type Expandable Anti-Theft Travel Backpack Capacity 29L (expandable to 40L) Dimensions 30 × 20 × 48 cm Laptop Compatibility Up to 17.3-inch laptop Tablet Compatibility Up to 12.9-inch iPad Opening 180° Clamshell Material Waterproof fabric Security Locking Zipper System Front Pocket Multiple quick-access organizer pockets
