This 40L travel backpack is a travel artifact. It is expandable to meet more storage needs. As a carry-on luggage backpack set, it is very practical. And it is approved by airlines, so you can fly without worries. Whether it is a short weekend trip or a longer trip, it can easily hold your belongings. Stylish appearance, high-quality materials, comfortable to carry. With it, travel is easier and more convenient, and it is the starting point of a wonderful journey