AIRLINE APPROVED PERSONAL ITEM BACKPACK: This laptop backpack can be easily opened 90-180 degrees at airport security, making it perfect for carry-on and air travel. Our travel backpack meets personal item requirements of airlines such as Spirit, Frontier, United, Easy Jet, Jet Blue, etc., and can be placed under the seat or overhead in standard carry-on size, making it an ideal gift for men, frequent travelers, and also ideal for camping and hiking LARGE CAPACITY EXPANDABLE TRAVEL BACKPACK: The carry-on luggage has plenty of room and meets airline requirements for personal items. Top and side handles make it easy to switch between backpack or suitcase. The straps on the back can be passed through a luggage tube for travel or business trips. Before expansion, the dimensions are 17.7x11.8x8.6inches; the expanded dimensions are 17.7x11.8x11.8 inches, offers you more packing capacity up to 40L MULTI-COMPARTMENTS & DRY-WET SEPARATION: This travel backpack has plenty of compartm