Airline approved carry on bag: size18.9x12.2x6.7 in/48x31x17 cm. The travel bag is airline approved for in-flight carry-on, it saves you a fortune in check-in fees and is perfect for travel or business under the airplane seat for 2-3 days of daily travel. Note: Please check with your airline for size restrictions prior to travel.Large capacity multi-pocket designThis Casual Daypack backpack has a main pocket x 1, front pocket x 2, side pockets x 2, laptop compartment x 1, back anti-theft zipper pocket x 1, and many small slots inside the main pocket. Multiple pockets bring us convenience and can make our items neatly sorted and easier to find.BREATHABLE SHOULDER STRAP DESIGN: This outdoor weekend overnight hiking backpack features soft, breathable foam padding and a sternum strap design. It easily adjusts and holds the pack securely, reducing stress on the shoulders and back and keeping you cool on long backpacking trips. The back is designed with straps to attach to a trolley case for easy travel carrying.Laptop Backpack USB Port: This USB backpack features an external built-in USB charger and an internal built-in charging cable, providing you with a more convenient way to charge your phone, iPad and laptop. Please note that this backpack does not include the power bank itself and the USB charging port only provides convenient charging.MULTI-PURPOSE USE: This lightweight backpack is easy to match with any of your outfits and works for both men and women. You can use it anywhere, as a college backpack, laptop backpack, casual backpack, weekend overnight bag, hiking bag, travel bag, etc. I believe it will be a very important partner in our daily life.