Expandable Travel Backpack | Tortuga。?[LARGECAPACITY EXPANDABLE ]45L travel backpack expandable, can hold the necessary items for 3-7 days of travel, can accommodate three or four sets of clothes, shoes(Comes with a separate shoe bag), and Other daily necessities. The computer compartment can hold a 17-inch laptop. The capacity before expansion is about 35L, and it is 45+L after expansion. It is an ideal travel backpack for men and women ?[AIRLINE APPROVED] Weight: about 4 lbs. This carry on backpack the size before expansion is 20*14*7 Inces, and the size after expansion is 20*14*9 Inces, which conforms to the size (22*14*9 Inces ) regulations of most airlines for carry on baggage, such as Delta Air Lines, Alaska Airlines, Southwest Airlines, United Airlines. It’s a carry on backpack airline approved and 180-degree zipper closure to get you through security quickly ?[EXTRA 4 PACKING CUBES] Travel backpack with four packing cubes. large cube for sweaters, jackets, pants. Medium cube for shirts, shorts. Small cube for toiletries such as makeup, cleanser, etc, there\'s also a shoe pocket. Keeping your belongings neater and more organized. without a doubt it’s a large travel backpack. If your clothes get wet, don\'t worry, there is a wet pocket at the top of the large compartment, which can hold 2 T-shirts or towels