38-50L Expandable Capacity - This large travel pack features an expandable design. Before expanded is 38L; after expanded is 50L. The laptop compartment fits most 18/17.3/17/15.6" laptops and tablets. The carry-on backpack complies with IATA maximum dimensions. It can be used as a necessity for daily life, business, travel, outdoor and other occasions. Multi-function & Flight Approved - TSA flight approved backpack, oversized travel laptop backpack can be freely unfolded 90-180°, making it easier to pass through airport security, allowing you to enjoy relaxed air travel. This laptop backpack comes with a luggage strap makes your travel easier, the airline approved backpack is your great companion for international travel, camping, overnight trip, business etc. Dry & Wet Separation - Simply unzip the expansion pocket for instant access to additional storage. The main compartment is designed with wet/dry separation. It opens 180 degrees for easy loading and unloading. The 90