Amazon.com: Vancropak Carry On Backpack, 45L Expandable 。?GENEROUS CAPACITY BUILT FOR TRAVEL: The carry-on backpack boasts a spacious 40/45 L capacity, making it ideal for 3-5 day trips. The versatile design allows this backpack to snugly fit in the overhead bin or under the seat ?AIRLINE-FRIENDLY PERSONAL ITEM BAG: TSA-friendly personal item bag designed to meet most airlines\' size requirements. The separate laptop compartment opens 180 degrees, facilitating quick and easy security checks ?COMFORTABLE DESIGN FOR TRAVEL: The carry-on backpack features a reinforced ergonomic design with a padded honeycomb sponge for ultimate comfort and breathability. Crafted from durable polyester material and equipped with high-quality metal zippers, it is built to withstand the rigors of travel ?FREE 3 PACKING CUBES: Including three free packing cubes - a mesh bag, toiletry bag, and shoe bag. Keep your belongings neatly organized and easily accessible whenever you need them. With a USB charging port and a built-in data cable ?VERSATILITY BEYOND TRAVEL: This multi-purpose travel backpack for women is adept as a carry-on bag, weekend bag, and even as a teacher, nurse, or college backpack.