No need to prepare a vacuum seal bag for travel, the design of the embedded vac pack not only effectively prevents water from entering, but more importantly, it can save a lot of space to store more items. There are two ways to perform packing vacuum bags for travel, one is manual and the other is an air pump. Excess gas inside can be removed by opening the air valve. In order to make your travel safer, the backpack adopts TSA lock design. You can better protect the items inside your back pack vacuum and reduce the possibility of loss. The password operation setting of the TSA customs combination lock is very simple.This airpack backpack saves you the trouble of checked baggage. You can carry this vacuum packaging backpack directly on the plane, saving time and worry. It saves you the trouble of pulling a trolley case