Airline Approved: Travel backpack size - 18 x 12 x 103 inches, maximum capacity - 40LThe carry-on luggage backpack meets the standard required by almost all major airlines and fits in the overhead compartment and under the seatThe flat opening design helps you get through security quicklyThis travel backpack is perfect for weekend trips, business trips, hiking and camping, etcKeep Everything Organized: The most important part of traveling is having fun, not dealing with workThe laptop backpack comes with 2-piece clothes storage bags and 1 shoe bagDifferent sizes can be used for different packing purposes, so that you can store your clothes more conveniently and organizedThe most important part of traveling is having fun, not dealing with workThe shoe bag fits 1-2 pairs of shoes, or can be a laundry bag to separate your dirty clothesRecurrent Update: Expandable design and large capacity(25L-40L) can store 3-5 days' worth of clothes when you needThe backpack also has a built-in elastic band, which can compress clothes, prevent them from falling off, maximize the use of backpack storage space, and save an additional 10% of the capacityDesigned for Travel: Comfortable airflow back design with thick and soft padding, effective back pressure relief, equipped with an adjustable chest buckle, you can walk more easilyThe computer backpack is made of durable polyester material, providing r protection for your belongings: Its stylish appearance makes it a college backpack, travel backpack, computer backpack, school bag, business backpackAirline approved carry-on luggage, can be worn overhead and under the seat, ideal for weekend trip, business trip, and travelThis large backpack is perfect for college, work, daily use, outdoor activities, or even as a birthday gift to friends, family, women, etc.