Amazon.com: RDTGO Carry on Backpack, 40L Flight Approved 。?【As Personal Item Airline Approved】Dimensions 14\'\' L* 18\'\' H *8\'\' W. Seamlessly complies with airline standards, it can be placed in in both overhead luggage compartments and under-seat storage during flights. Meeting personal item requirements for major airlines such as Frontier, Easy Jet, Spirit, and Jet Blue, it effortlessly opens at 90-180 degrees, streamlining your journey through airport security. ?【1 Large Duffel Bag】 The set includes an extra foldable and expandable carry-on duffel bag for various occasions, such as travel, gym, daily commutes, shopping, and weekend getaways. Lightweight and foldable into your backpack, it has an expansion layer at the bottom for 45% more capacity when needed. A luggage strap is included for secure attachment to your suitcase. ?【Roomy Capacity & Multi-Pocket】: The 40L Travel Backpack has 1 large main compartments and multiple pockets offer efficient organization and quick access. Separate compartment for a 17.3\'\' laptop for work and college essentials. A hidden anti-theft pocket at the back secures essential items such as wallet, passport, and ID card. The suitcase backpack also has a side bottle pocket to keep your water cold/warm and a wet and dry compartment for dirty clothes.