Amazon.com: 35L Travel Backpack,Flight Approved Carry On 。? Our Product: from the product video, it can be seen that travel carry on backpack is very nice. this is because he has excellent workmanship, but more importantly, the materials used are very good and thick. there are many other details that we exclusively customize. ? Concept: a simple and elegant business weekender backpack with 17.3 inch laptop compartments and waterproof compartments. the main compartment is equivalent to a 35l suitcase. a private pocket on the back of 35l backpack for storing passports and change. ?Expandable Space: opening the zipper (increase backpack suitcase width by 2 inches) , can provide more storage space. more importantly, under normal circumstances, there is no difference in size compared to laptop bags, and they can be used daily. ?TSA Design: this 35l travel backpack size complies with the airline\'s carry on regulations and can be opened 180 degrees, making it very easy and fast to pass airport security checks. this carry on luggage backpack can also be transformed from a backpack to a suitcase style. ? Widely Used: carry on backpack for airplanes are perfect for weekend vacations, travel, nursing schools, and daily use. he is also a great gift for friends, very suitable as a back to school gift, birthday gift, holiday gift, etc.