✈【Flight Approved Carry on Backpack】: Size of travel backpack: 18.5*12.6*8 inches. Capacity: 40L. This luggage backpack is meet the allowed maximum size of most IATA flights and also fits in the overhead compartment and the underseat in flight. The portable opening facilitates you to quickly pass the airport security check. It also has built-in elastic bands to keep your clothes from falling out. This travel backpack is great for flight travel, camping, hiking, college, etc. | ✈【Large Travel Backpack for women】This backpack is made of waterproof durable polyester, good air permeability and heat dissipation with two padded shoulder straps, offers lightweight carrying and of force reinforcement, relieve the pressure of your shoulders, and keeping cool when you carry it for a long time. And it is tough, firm and does not fade. | ✈【Anti-theft Multifunctional Backpack】There is a zipper pocket on the back of the bag, which can store valuables such as mobile phones and iPads, which is anti-theft and convenient. Multifunctional Daypacks：Hybrid (Backpack/Duffle Bag/Shoulder Bag/Travel Bag) conversion. Can be used several different ways. It can be served as everyday backpack,spacious college bags, professional backpack for laptop or daily use at anywhere for weekend getaway,occasional | ✈【USB PORT DESIGN】 With builtin USB charger outside and builtin charging cable inside, offers a more easier way to charge your phone while walking or cycling. | ✈【MOST DURABLE & BEST GIFT CHOICE】:The backpack for travel is made of durable, water-resistant polyester and anti-scratch material, which can provide protection on drizzle days. Sturdy metal double zipper and upgraded reinforced stitching make it last longer.This item is not intended for use by children 12 and under